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What is another word for
tough nut to crack
?
Need
synonyms for tough nut to crack
? Here's a list of
similar words
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that you can use instead.
Contexts
▼
▲
Adjective
Stubbornly, and usually unreasonably, holding to an opinion, decision or purpose
Not able to be changed or adapted
Noun
A puzzling situation or problem
… more ▼
▲
Adjective
▲
Stubbornly, and usually unreasonably, holding to an opinion, decision or purpose
obdurate
obstinate
stubborn
implacable
inflexible
adamant
unbending
unrelenting
unyielding
firm
immovable
intransigent
mulish
relentless
stiff-necked
wilful
determined
dogged
fixed
headstrong
inexorable
intractable
iron
hard
persistent
uncompromising
unshakeable
bull-headed
tenacious
indurate
pertinacious
steadfast
strong-minded
unmalleable
unpersuadable
adamantine
bloody-minded
bullheaded
contumacious
hardened
hardheaded
hard-nosed
inconvincible
iron-willed
opinionated
ossified
pat
perverse
pigheaded
refractory
self-opinionated
self-willed
stony
willful
unimpressible
bullhead
hardhearted
harsh
impertinent
mean
recalcitrant
rigid
tough
uncompassionate
uncooperative
unemotional
unrepentant
unshakable
cold fish
hanging tough
proof against persuasion
set in stone
resolute
unwavering
single-minded
persevering
contrary
strong-willed
unflinching
balky
froward
unmanageable
insistent
staunch
difficult
indefatigable
unswerving
unreasonable
purposeful
incompliant
resolved
steely
unfaltering
stalwart
set
cussed
indomitable
insubordinate
defiant
strict
bolshie
wayward
disobedient
stiff
steady
unflagging
rebellious
cantankerous
obstreperous
intent
ungovernable
unaccommodating
hard-line
committed
rock-ribbed
tireless
strong
restive
stroppy
untoward
unbendable
unruly
solid
dedicated
dead set
bound
awkward
earnest
decided
undeviating
cross-grained
grim
uncompliant
rigorous
assiduous
rebel
stubborn as a mule
constant
uncontrollable
recusant
untiring
troublesome
importunate
remorseless
spirited
stringent
unshaken
forceful
locked in
renitent
hardline
contrarious
fractious
unmovable
dead set on
decisive
set in one's ways
tiresome
unhesitating
undisciplined
deaf to reason
ornery
true
stern
pervicacious
unsparing
annoying
thrawn
undaunted
obstructive
disobliging
vigorous
unadaptable
sedulous
severe
full of determination
diehard
wild
driven
brassbound
stout
unhelpful
exacting
bold
die-hard
mettlesome
stable
pig-headed
gritty
ruthless
perseverant
hard and fast
diligent
vexatious
unswayable
pitiless
serious
emphatic
wrong-headed
mutinous
noncompliant
deliberate
ardent
unappeasable
plucky
bound and determined
assertive
unchangeable
bent upon
merciless
immutable
gutsy
pushy
unalterable
spunky
demanding
rugged
patient
bent
faithful
unchanging
sure
four-square
hard-core
loyal
devoted
purposive
dyed-in-the-wool
do-or-die
manful
zealous
fanatical
bent on
draconian
bulldog
hell-bent on
hell-bent upon
brave
authoritarian
devout
resistant
courageous
indocile
focused
US
cruel
aggressive
strenuous
enduring
immobile
settled
avid
valiant
keen
critical
unpredictable
oppressive
dour
incorrigible
imperious
trying
stout-hearted
incontrollable
undisciplinable
unforgiving
true-blue
domineering
definite
persisting
energetic
unswervable
out
iron-fisted
fierce
focussed
UK
dogmatic
heavy-handed
cast-iron
meaning business
feisty
tyrannical
standing one's ground
dependable
go-getting
blinkered
self-assertive
hard as nails
arbitrary
capricious
haughty
exigent
mule
reliable
clamorous
ambitious
unremitting
pressing
unfailing
picky
nagging
locked
unwilling
trustworthy
disciplinary
trusty
fast
motivated
insuppressible
unrestrainable
insurgent
uptight
obstinately disobedient
invariable
good
obsessed
enterprising
unbreakable
hungry
unpermissive
dire
unflappable
allegiant
ill-natured
crabby
disorderly
fussy
enthusiastic
obsessive
monomaniacal
tough nut
industrious
non-compliant
eager
narrow-minded
unmoving
thirsty
desirous
active
inspired
overbearing
unamenable
compulsive
positive
not giving an inch
established
perfectionist
delinquent
high-pressure
brick-wall
disputatious
aspiring
no-nonsense
dictatorial
possessive
militant
dug in
stand pat
wholehearted
opinionative
hardy
assured
argumentative
querulous
hang tough
sticking to one's guns
hard to please
unabated
unqualified
standing pat
austere
hypercritical
as stubborn as a mule
prickly
cynical
sturdy
negative
hell bent on
irritable
touchy
self-starting
hard-driving
hard-and-fast
changeless
chippy
goal-oriented
never-failing
intense
stop at nothing
over-particular
self-driven
hard to handle
hell-bent
formidable
hard to satisfy
self-confident
irrational
biased
illogical
inveterate
unbudgeable
incurable
contentious
unconverted
unreformed
prejudiced
intolerant
mullish
estranged
seditious
disaffected
factious
irreconcilable
alienated
firmly-based
unsubduable
unvacillating
frozen
petrified
stiffened
forbidding
illiberal
insoluble
thorny
unpliable
problematic
knotty
hidebound
intrepid
impassive
unstoppable
game
durable
immalleable
unresponsive
fossilized
US
bony
indurated
rigidified
unreceptive
boneheaded
peevish
morose
truculent
stony-hearted
unimpressionable
unmoved
heady
never-tiring
cocksure
great
puritanical
aloof
proud
convinced
uncontainable
irrepressible
unmodifiable
permanent
quiescent
hellbent
cohesive
sticky
pounding
mortal
hard-headed
shrewish
inalterable
fossilised
UK
categorical
stuffy
coherent
rocklike
belligerent
down-the-line
pious
stanch
insubmissive
radical
opposing
resisting
withstanding
unregenerate
exasperating
unforgetful
with a will of one's own
determined to have one's own way
hard-shell
locked-in
unflexible
crisp
doctrinaire
set-on
one-sided
iron-jawed
unplacatable
iron-handed
unmollifiable
inescapable
unpacifiable
intent on
thick-skinned
toughened
in for long haul
like bad penny
set in concrete
set on
irreversible
exact
concrete
clear-sighted
all out
flat-out
straight out
tall in the saddle
on one's mettle
insistent on
intent upon
determined to
committed to the idea of
with one's feet dug in
with one's toes dug in
do or die
hold the fort
hold your ground
hold the line
unvarying
static
ramrod
ineluctable
dissident
hostile
contrariant
nonconforming
discordant
arsey
nonconformist
paradoxical
adverse
disagreeing
antagonistic
abiding
liege
unquestioning
tried-and-true
set in your ways
wrongheaded
antipathetic
inimical
converse
dissentient
necessary
ironclad
compulsory
judgmental
disapproving
untameable
consumed
compelled
pesky
vexing
rocky
resilient
decided upon
writ in stone
cut-and-dried
strait-laced
turbulent
violent
striving
possessed
competitive
whole-hearted
overexacting
cavilling
UK
disciplinarian
callous
drastic
ascetical
by the book
absolute
astringent
uncharitable
hard-hearted
browbeating
extreme
rough
ascetic
unsympathetic
autocratic
grave
confident
dynamic
galvanized
US
impelled
out of control
mean business
determinate
dominant
certain
in earnest
difficult to handle
cramped
complex
bulky
discommodious
incommodious
disagreeable
nonmoving
cutthroat
sustained
ferocious
robust
prevailing
inexpugnable
seasoned
induced
fixated
obsessional
quibbling
disparaging
sticklerish
faultfinding
overscrupulous
needy
hairsplitting
caviling
US
censuring
cavillous
unbudging
progressive
bloodthirsty
pioneering
freaked
like a loose cannon
excited
overwhelming
beside oneself
badly-behaved
abandoned
lawless
overpowering
explicit
consistent
going
no going back
patriotic
nonmotile
warlike
gladiatorial
brutal
scrappy
pushed
steered
guided
impulsive
besetting
galvanised
UK
dutiful
demeaning
carping
censorious
like death and taxes
clamant
urgent
erratic
fickle
immotile
impervious
self-asserting
full-blooded
intensely competitive
in-your-face
self-seeking
fiercely competitive
get up and go
power-hungry
having killer instinct
cut-throat
dog-eat-dog
hang-tough
go for broke
self-assured
can-do
eager beaver
power-loving
gung ho
high-reaching
self-possessed
powerful
fit
fervent
trusted
over-rigorous
fault-finding
over-strict
over-exacting
over-censorious
high-maintenance
fastidious
boorish
finicky
through-and-through
doughty
urged on
irremovable
genuine
oafish
bearish
irascible
discontented
dissatisfied
tough as old boots
red-blooded
two-fisted
high-powered
as tough as old boots
hard-bitten
impassioned
supportive
close
instant
imperative
burning
crying
emergent
acute
compelling
entreating
necessitous
vexed
testy
choosy
captious
snappy
temperamental
quarrelsome
disputative
huffy
delicate
overcritical
particular
ungracious
grumbly
finical
invidious
fiendish
sensitive
crotchety
uppity
sour
rude
irritating
impolite
impossible
unbearable
undependable
intolerable
perfervid
fervid
naughty
errant
immoral
aberrant
secure
passionate
disturbing
solicitous
suppliant
overeager
harassing
anchored
rooted
true-hearted
nailed
quiet
hitched
hooked
situated
attached
stationary
still
located
tight
tried and true
true to life
tried and tested
badly behaved
made fast
self-indulgent
overly solicitous
sound
authoritative
entrenched
unassailable
deep-rooted
confirmed
final
conclusive
safe
unequivocal
indubitable
indestructible
ingrained
clear
lasting
indisputable
sincere
undeniable
incontrovertible
unquestionable
unmistakable
deep-seated
flat
irrefutable
deep
unambiguous
ineradicable
impregnable
long-lasting
incontestable
lionhearted
commanding
invulnerable
deep-dyed
bossy
inured
honest
infallible
well-built
vehement
convincing
upright
evident
peremptory
tried
substantial
responsible
invincible
indelible
real
guaranteed
imperishable
sworn
known
demonstrable
heavy-duty
card-carrying
obvious
verifiable
rock-solid
fearless
well-founded
true blue
in the bag
valid
uniform
hearty
lusty
unfluctuating
long-standing
conscientious
definitive
unerring
binding
effective
bred-in-the-bone
honorable
US
honourable
UK
undoubted
incorruptible
well-established
inarguable
supreme
heavy
eternal
confirmable
fortified
establishable
lordly
long-established
even
bullish
magisterial
hard-wearing
unchallengeable
masterful
out-and-out
straight
plain
audacious
airtight
hard-working
clear-cut
forward
ascertained
cogent
profound
beyond doubt
patent
beyond question
provable
through and through
sharp
trustable
influential
mad keen
calculable
perdurable
heroic
intrenched
chronic
reinforced
invariant
unarguable
sure thing
high-handed
having down pat
high-spirited
bulletproof
unanswerable
everlasting
despotic
forcible
watertight
impressive
well-made
imposing
collected
regular
well-defined
irrefragable
proven
composed
impenetrable
manifest
well established
scrupulous
inviolable
predestined
destined
undisputable
unfading
unconquerable
daring
truthful
concentrated
potent
made to last
persuasive
complete
thorough
dauntless
salted away
on ice
continuing
thoroughgoing
hard-hitting
irrevocable
telling
perpetual
heartfelt
incommutable
equable
habitual
unafraid
undying
express
adherent
pushful
studious
savage
accomplished
unapologetic
unashamed
level
bombproof
pledged
well fortified
ultimate
strapping
overweening
well-constructed
muscular
indissoluble
armoured
UK
significant
incisive
distinct
palpable
firmly established
beyond dispute
tyrannous
autocratical
tyrannic
undismayed
recognized
US
trenchant
armored
US
arrogant
unattackable
high-principled
recognised
UK
direct
red-hot
implanted
absorbed
engrossed
orthodox
poised
keen as mustard
confining
behind one
pure
excessive
gallant
valorous
redoubtable
shatterproof
unshrinking
unbeatable
basic
fundamental
unaffected
strengthened
concentrating
preoccupied
inbred
agreed
foolproof
unconditional
unruffled
occupied
immersed
healthy
utter
arranged
independent
continuous
inbuilt
built-in
unsurpassable
calm
dominating
fiery
doubtless
cool
unfazed
stated
riveted
unsentimental
non-breakable
nonnegotiable
specified
infrangible
proved
desperate
inevitable
mighty
flinty
long-lived
subconscious
lingering
inherent
innate
embedded
lifelong
revering
accustomed
habituated
staid
unchanged
longtime
accepted
full-bore
self-reliant
venerating
greathearted
gutty
stouthearted
undauntable
heroical
coercive
straightforward
perennial
dense
important
resounding
decent
imperial
inseparable
solemn
precise
undefeatable
predictable
arrant
right-down
thick
brawny
insurmountable
insuperable
righteous
impassable
hard-boiled
unimpeachable
athletic
leathery
accurate
instilled
wrapped up
effectual
ringing
plausible
efficacious
weighty
lucid
intelligent
undeterred
infixed
finished
sure of oneself
bosom
transparent
sealed
monotonous
not in doubt
impassible
truehearted
deeply felt
pertinent
officious
boon
able-bodied
undisputed
nailed-on
impeccable
single-minded about
firm about
stabile
deep-down
full-fledged
fortress-like
strongly made
well-set
obedient
compact
not backward in coming forward
deep-set
resolved to
sinewy
capable
able
veracious
well defended
deeply ingrained
fail-safe
confiding
obsessive about
loving
circumspect
as sure as eggs is eggs
on the level
inflexible about
out and out
sure-fire
fixated on
fanatical about
carved in stone
solid as a rock
beyond a shadow of a doubt
affectionate
string along with
clinging
self-disciplined
mature
ended
not joking
predisposed
tending
inclined
leaning
disposed
hardboiled
buckled down
sine qua non
like granite
pegged
unforgettable
ineffaceable
unblinking
immoveable
uninfluenced
unaltered
unintimidated
free from doubt
persuaded
satisfied
for a fact
formal
gut
instinctive
intrinsic
planned
prearranged
hopeless
endemic
moored
fastened
risk-free
brassy
self-evident
clinching
masterly
jelled
high-stake
winner-take-all
zero-sum
win-or-lose
irradicable
inannihilable
worn
low-risk
unbothered
untouched
unvaried
uninterrupted
unmodified
steamroller
nervy
powerhouse
unabashed
undebatable
punishing
punitive
Draconian
defined
quantified
credible
engaged
enthralled
riskless
hopeful
in place
in position
nonbreakable
resolute about
driven in
undoubting
poignant
acrimonious
drawing
spartan
bidding
ordering
sagacious
limited
beyond hope
systematic
meticulous
painstaking
on one's side
predetermined
preset
attentive
impatient
imperturbable
nerveless
preconceived
apodictic
manly
engagé
telelogical
calculated
surefire
inextinguishable
immortal
assaultive
punitory
unsinkable
brass-bound
ironhanded
onerous
congenital
undiscouraged
hulking
husky
beefy
rock-hard
upstanding
dinkum
tried and trusted
dashing
unquenchable
bitter
furious
granite
lion-hearted
carnivorous
open and shut
mandatory
dictated
written
brusque
perceptive
take charge
grounded
as thick as thieves
thickset
stark
regimented
adoring
goody-goody
worshipping
UK
worshiping
US
heart-and-soul
pietistic
reputable
respectable
dyed-in-the wool
built to last
impermeable
unwearied
incessant
Herculean
inerrant
questionless
failsafe
believing in oneself
going for broke
satisfying
material
crystalline
abrupt
summary
brisk
going all the way
serious-minded
meaning what one says
fundamentalist
in good faith
well grounded
uncontested
unquestioned
unchallenged
acknowledged
firm in spirit
animated
tough-minded
resourceful
determining
nasty
insistent about
careful
incorrupt
nonperishable
deathless
vicious
virulent
disciplined
controlled
religious
as keen as mustard
single-hearted
old faithful
true to the end
given over to
can't-miss
salient
playing hard ball
to the core
not put off
not discouraged
observant
fixed as the laws of the Medes and the Persians
not changeable
by the numbers
staying put
hardhanded
hale
big
not in question
traditional
conservative
reverent
reiterative
etched in stone
based on
controlling
self-respecting
puissant
be out for blood
nose to the grindstone
prayerful
goody two-shoes
adventurous
have-a-go
intuitive
insightful
relevant
ingenious
endless
unfeeling
abrasive
unjust
unfair
correct
believable
entire
all
exclusive
enrapt
whole
undivided
in fine feather
cold
inexhaustible
weariless
unceasing
inborn
longstanding
torrid
impenitent
irredeemable
unreformable
daredevil
knockabout
unpierceable
repressive
moral
right
just
virtuous
ethical
nice
flawless
perfect
lofty
uncaring
venturesome
ballsy
death-or-glory
puncture-proof
unbroken
continual
watchful
alert
well protected
hale and hearty
there are no two ways about it
all sewn up
unkind
inconsiderate
heartless
insensitive
right-minded
principled
unappealable
plugging
jumping
go-go
grind
unstinted
hyper
perky
fireball
continued
plodding
venturous
sicker
pugnacious
all-or-nothing
closed
waterproof
rational
adult
case-hardened
veridical
undistorted
square
worthy
creditable
all right
estimable
storm-resistant
stormproof
cocky
dogmatical
Neronian
imprudent
herolike
chivalrous
chin-up
foolhardy
as game as Ned Kelly
fortitudinous
competent
capable of being trusted
nonbreaking
unwreckable
undestroyable
inextirpable
efficient
inexterminable
qualified
hermetic
undestructable
unruinable
irrefrangible
lean
balanced
rowdy
curt
in charge
well-armed
flourishing
well-protected
high and mighty
crack-the-whip
throwing weight around
egotistic
pompous
dictative
standardized
US
nonstop
homogeneous
regularised
UK
regularized
US
standardised
UK
bona fide
total
determinative
irremediable
unreversible
deep down
shrewd
practical
realistic
murky
unpiercable
hermetically sealed
tightly packed
hard-shelled
no lie
up front
closely controlled
strictly controlled
rigidly enforced
intensive
unrectifiable
unrepealable
matter-of-fact
down-to-earth
like the Rock of Gibralter
solid as rock
all-consuming
minding
certified
steeled
molded
US
moulded
UK
conditioned
in a straight line
undisturbed
world-weary
cool-headed
remove
affirmed
hard-edged
compacted
packed
hard-handed
consolidated
compressed
out to
fixed upon
anxious to
committed to
intending to
fixed on
obsessed with
resolved on
impatient to
decisive about
determined on
lodged in one's brain
on the up and up
well balanced
well-balanced
downright
outright
sacrosanct
unperturbed
lacking sentiment
secured
attested
glaring
stressed
pointed
sober
accented
set firm
tough as nails
as hard as nails
toughened by experience
sacred
without loopholes
iron-clad
one hundred per cent
fibrous
stringy
peaceful
recollected
untroubled
coolheaded
serene
limpid
equal
unworried
tranquil
sedate
together
placid
self-composed
smooth
holy
no mistake
for a face
copper-bottomed
specific
univocal
black-and-white
hallowed
untouchable
unalarmed
inalienable
well-marked
minute
forthright
graphic
pronounced
full
clean-cut
distinguishable
noteworthy
audible
visible
tangible
undubitable
silhouetted
vivid
well-grounded
at peace
black and white
as plain as daylight
clearly defined
cut and dried
crystal clear
not vague
intemerate
as plain as the nose on your face
unbreachable
divine
uninfringeable
inviolate
more ❯
Adjective
▲
Not able to be changed or adapted
rigid
rigorous
stern
severe
firm
stringent
uncompromising
harsh
intransigent
strict
unrelenting
unyielding
adamant
fixed
set
austere
immutable
steadfast
authoritarian
bound
brassbound
concrete
exact
exacting
hard
immovable
inflexible
irreversible
obdurate
resolute
tough
unalterable
unbending
unchangeable
undeviating
unshakeable
unswerving
unwavering
determined
incompliant
invariable
ramrod
static
unadaptable
unchanging
unpermissive
unvarying
bullheaded
changeless
definite
inexorable
unmoving
cast-iron
hard-and-fast
hard-line
heavy-handed
locked in
dead set
cut-and-dried
hard and fast
set in stone
writ in stone
decided upon
single-minded
strait-laced
stubborn
obstinate
dogged
relentless
implacable
pigheaded
tenacious
pertinacious
hard-nosed
adamantine
headstrong
hardheaded
hardened
stiff
stiff-necked
mulish
opinionated
perverse
willful
intractable
self-willed
wilful
ossified
inconvincible
indurate
pat
self-opinionated
solid
persistent
grim
steady
cruel
stable
draconian
unflinching
unshakable
staunch
steely
unsparing
ruthless
strong
pitiless
merciless
established
remorseless
persevering
forceful
refractory
unpersuadable
constant
tight
hardline
flinty
oppressive
stony
unmovable
iron-willed
rooted
settled
unforgiving
extreme
entrenched
diehard
fast
unsympathetic
recalcitrant
ironclad
bloody-minded
iron
resolved
hard-core
brutal
iron-fisted
illiberal
fierce
callous
sturdy
frozen
unbendable
contumacious
cussed
unmalleable
unfaltering
unreasonable
vigorous
bull-headed
cantankerous
balky
hard-hearted
unfeeling
strong-willed
hard-boiled
incommutable
die-hard
rugged
dead set on
inalterable
rough
permanent
dyed-in-the-wool
immobile
demanding
no-nonsense
serious
uniform
uncompliant
enduring
heartless
deep-rooted
radical
uncooperative
inhuman
inveterate
grave
strong-minded
stationary
savage
unmerciful
unbreakable
secure
unappeasable
disciplined
uncharitable
set in one's ways
unfluctuating
binding
intolerant
dour
abiding
dogmatic
regular
unmodifiable
deep-seated
unmanageable
stalwart
hidebound
committed
solemn
lusty
ornery
purposeful
decided
indomitable
insensitive
bolshie
resistant
still
drastic
unsmiling
final
hearty
determinate
earnest
ordered
dedicated
unpitying
ferocious
robust
nonmoving
picky
indefatigable
tyrannical
narrow-minded
immotile
assertive
consistent
bold
stony-hearted
confirmed
hard as nails
ingrained
riveted
long-standing
pig-headed
irremovable
anchored
inhumane
perpetual
aggressive
stout
durable
devoted
locked
zealous
sedate
staid
even
brick-wall
onerous
unswayable
barbarous
unvaried
despotic
humourless
UK
humorless
US
sober
fanatical
contrary
regimented
lasting
unfailing
invariant
uncomic
rock-ribbed
defiant
inexpugnable
sobersided
froward
flat
unflagging
punishing
case-hardened
sadistic
stuck
unemotional
not giving an inch
certain
cold-blooded
difficult
uncaring
closed-minded
win-or-lose
sure
tireless
same
confining
by the book
weighty
intent
astringent
sustained
impenetrable
doctrinaire
forbidding
mean
absolute
unabated
cross-grained
unremitting
winner-take-all
zero-sum
unbudging
equable
hanging tough
fossilized
US
cut-throat
nonmotile
hard-bitten
hardhanded
hardhearted
po-faced
stubborn as a mule
deep-dyed
emphatic
rebellious
stabile
insubordinate
disciplinary
deaf to reason
bound and determined
incontrovertible
deep
uptight
stuffy
untoward
faithful
bred-in-the-bone
intrenched
strictly controlled
mule
devout
closely controlled
fossilised
UK
restive
cold
unbudgeable
immobilized
US
bitter
explicit
moored
hitched
predictable
immoderate
insistent
untiring
brutish
hooked
attached
heavy
compassionless
unshaken
unaccommodating
soulless
all-or-nothing
monolithic
affectless
unsentimental
imperious
nailed
overbearing
ironhearted
stoney
stonyhearted
desperate
systematic
pachydermatous
indurated
excessive
murderous
insensate
punitive
desensitized
US
hardy
unrelieved
trying
dire
toughened
assiduous
monotonous
hard-headed
sedulous
hard to please
true-blue
inured
driven
undiversified
habitual
ineradicable
militant
unchanged
hard-hitting
true
reliable
unkind
autocratic
made fast
truculent
energetic
tyrannous
ageless
level
unmoved
stroppy
thick-skinned
slash-and-burn
take-no-prisoners
cutthroat
standing pat
opinionative
bloodthirsty
businesslike
desensitised
UK
domineering
ardent
contrarious
dictatorial
decisive
well-set
immobilised
UK
feisty
vindictive
stand pat
critical
unqualified
wrong-headed
dug in
dog-eat-dog
sticking to one's guns
never-failing
go-getting
solid as a rock
clear-cut
shortsighted
blind
deaf
incontestable
high-stake
puritanical
controlled
petrified
stiffened
regimental
noncompliant
renitent
spartan
fastened
Draconian
awkward
bony
immalleable
rigidified
non-compliant
jammed
immotive
ironhanded
scrupulous
meticulous
painstaking
rigidly enforced
reactionary
traditionalist
conservative
punitory
loyal
ungiving
unstoppable
poignant
valid
powerful
convincing
compelling
acrimonious
drawing
remove
close-minded
braced
heady
violent
tormenting
maleficent
wolfish
torturous
barbaric
ultra-conservative
unprogressive
impassive
jelled
unflappable
convinced
eternal
formal
cool
unimpressionable
pounding
mortal
biased
embedded
lacking compassion
with a heart of stone
cold-hearted
tough nut
set in concrete
quiescent
unimpressible
dependable
set-on
one-sided
abusive
disciplinarian
ascetical
pressing
browbeating
formidable
ascetic
preconceived
unflexible
crisp
unitary
undifferentiated
unplacatable
iron-handed
unmollifiable
inescapable
unpacifiable
cold fish
proof against persuasion
impertinent
bullhead
unrepentant
uncompassionate
pugnacious
suppressive
fixed as the laws of the Medes and the Persians
not changeable
obscene
pornographic
X-rated
reserved
indelible
sacrosanct
well-established
snug
clenched
tightened
clinched
focused
US
hurtful
monstrous
coldhearted
vengeful
bestial
by the numbers
two-fisted
with one's feet dug in
with one's toes dug in
steel
calm
unfriendly
chilly
frigid
icy
frosty
do or die
hold the fort
hold your ground
standing one's ground
hold the line
independent
vicious
forcible
virulent
ineluctable
uninterrupted
continuous
complex
rule-bound
pass-fail
high stakes
hard-shelled
distant
aloof
well grounded
blimpish
implanted
good
down-the-line
trusty
pious
stanch
cynical
agreed
unwaivering
hard-shell
thick
long-lived
staying put
secured
like death and taxes
mean business
no going back
necessary
hell bent on
compulsory
louring
gruff
unabating
monomaniacal
never-ending
interminable
ceaseless
incessant
continuing
unceasing
hellbent
obsessed
continual
non-stop
arranged
preset
complicated
grounded
firmly established
obsessive
remote
lowering
intimidating
predetermined
allotted
specified
prearranged
imperishable
unfading
unquestionable
absolutist
irrevocable
defined
decreed
precise
prescribed
hell-bent on
bent on
bent upon
full of determination
focussed
UK
do-or-die
hell-bent
hell-bent upon
out
rock hard
shrewd
practical
realistic
sombre
UK
somber
US
ungentle
tactless
based on
deeply felt
restricted
fogyish
stick-in-the-mud
conformist
planned
express
bureaucratic
officious
involved
fitted
clasped
lodged
never-changing
matter-of-fact
down-to-earth
allegiant
intense
wholehearted
liege
unquestioning
tried-and-true
trustworthy
mean-looking
fixed as the laws of the Medes and Persians
high-handed
unblinking
authoritative
world-weary
definitive
stipulated
stated
inconsiderate
thoughtless
undaunted
in the bag
not subject to change
hard-edged
compacted
packed
hard-handed
compact
rocky
concentrated
consolidated
compressed
well-organized
well-ordered
inept
undiplomatic
bungling
similar
lacking sentiment
not changing
gutsy
identical
matching
equivalent
as hard as nails
as tough as old boots
toughened by experience
OTT
overstrict
coercive
non-variable
non-relative
gritty
unamenable
fussy
equal
homogeneous
resilient
ambitious
enterprising
on a tight rein
straight
fated
orderly
fateful
well-proportioned
plumb
well-balanced
in black and white
symmetrical
unbroken
consonant
incorrigible
of a piece
normal
compatible
methodical
smooth
fastidious
boorish
argumentative
finicky
hungry
over the top
eager
keen
competitive
motivated
oafish
bearish
irascible
troublesome
discontented
dissatisfied
fractious
obstreperous
avid
spirited
confident
thirsty
desirous
diligent
active
enthusiastic
aspiring
dynamic
burdensome
nasty
grievous
searing
excruciating
repressive
fiery
leathery
hard-wearing
substantial
sound
seasoned
quiet
situated
located
irritable
tiresome
vexed
testy
choosy
captious
snappy
temperamental
chippy
quarrelsome
disputative
hypercritical
prickly
querulous
thrawn
huffy
negative
delicate
overcritical
obstructive
particular
over-particular
ungracious
grumbly
disobliging
importunate
finical
unpredictable
hard to handle
invidious
fiendish
sensitive
ill-natured
crotchety
uppity
touchy
sour
rude
crabby
hard to satisfy
irritating
impolite
disputatious
perfectionist
inspired
progressive
pioneering
pushy
industrious
assured
burning
unquenchable
furious
granite
indestructible
warlike
gladiatorial
scrappy
motionless
fit
strapping
brawny
steeled
molded
US
mighty
cohesive
moulded
UK
dense
healthy
conditioned
inert
self-asserting
full-blooded
intensely competitive
in-your-face
self-seeking
goal-oriented
fiercely competitive
get up and go
stop at nothing
power-hungry
having killer instinct
self-assertive
self-starting
self-driven
hang-tough
high-pressure
go for broke
self-assured
can-do
eager beaver
power-loving
gung ho
high-reaching
self-possessed
self-confident
hard-driving
well-built
heavy-duty
withstanding
long-lasting
stock-still
stopped
categorical
inactive
halted
made to last
wanton
tough as nails
stagnant
standing
parked
unstirring
at a standstill
lifeless
at rest
inanimate
mean machine
having a killer instinct
uncalled-for
gridlocked
not moving
rooted to the spot
like a statue
standing still
latent
sticky
format
not moving a muscle
deadlocked
stalled
passive
more ❯
Noun
▲
A puzzling situation or problem
puzzler
challenge
mystery
abstruseness
charade
chiller
cliffhanger
conundrum
crux
cryptogram
difficulty
enigma
grabber
inscrutability
mystification
occult
oracle
perplexity
poser
problem
puzzle
puzzlement
question
rebus
riddle
rune
secrecy
sphinx
stickler
stumper
subtlety
teaser
thriller
twister
whodunit
why
brainteaser
braintwister
closed book
inscrutableness
mindboggler
sixty-four-thousand-dollar question
brain-teaser
dilemma
paradox
head-scratcher
mind-boggler
unsolved problem
sixty-four dollar question
secret
complexity
quandary
knotty problem
bewilderment
mind-twister
toughie
facer
cruncher
abstrusity
knotty question
snarl
awkward problem
difficult question
roun
vexed question
tough one
intricacy
brain-twister
question mark
complication
tough proposition
how-do-you-do
can of worms
hard nut to crack
fix
involvement
obscurity
inextricability
uphill
obfuscation
koan
entanglement
distraction
embarrassment
Chinese puzzle
maze
doubt
strait
predicament
confusion
plight
labyrinth
sticker
knot
parable
a closed book
Gordian knot
difficult proposition
convolution
complicacy
tangle
web
chaos
imbroglio
trickiness
complexness
complicatedness
knottiness
mess
morass
net
muddle
mesh
disarray
twist
mire
skein
jungle
tortuousness
convolutedness
inexplicableness
mystique
turn
magic
depth
mysteriousness
profundity
incomprehensibility
esotericism
vagueness
jumble
mishmash
hash
medley
assortment
clutter
mixture
sophistication
collage
agglomeration
miscellany
patchwork
hodgepodge
variety
mélange
smorgasbord
network
potpourri
reconditeness
arcaneness
deepness
occultness
motley
montage
miscellanea
hardness
intricateness
motley collection
mixed bag
bundle
mass
patchwork quilt
mash-up
weave
awkwardness
difficultness
elaborateness
involution
involvedness
more ❯
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tough nut to crack
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Nearby Words
tough one
tough out
tough out it
tough person
tough project
tough proposition
tough nuts to crack
tough nut
tough noogies
toughness of spirit
toughnesses
toughness
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tough nut to crack
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