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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
from our
thesaurus
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
single-minded
unwavering
contrary
persevering
strong-willed
balky
froward
unflinching
unmanageable
insistent
staunch
difficult
unswerving
unreasonable
steely
purposeful
indefatigable
set
insubordinate
incompliant
resolved
strict
defiant
unfaltering
disobedient
wayward
stalwart
cussed
indomitable
stiff
rebellious
bolshie
obstreperous
ungovernable
steady
cantankerous
intent
restive
hard-line
unaccommodating
unflagging
untoward
strong
unruly
committed
rock-ribbed
tireless
stroppy
unbendable
grim
uncompliant
solid
rebel
dedicated
recusant
rigorous
dead set
bound
decided
awkward
remorseless
earnest
undeviating
cross-grained
stringent
assiduous
constant
stubborn as a mule
dogmatic
uncontrollable
untiring
troublesome
importunate
fractious
ornery
spirited
unshaken
forceful
locked in
renitent
vigorous
hardline
contrarious
decisive
unmovable
dead set on
tiresome
unhesitating
set in one's ways
undisciplined
unadaptable
deaf to reason
prejudiced
diehard
true
stout
assertive
pervicacious
annoying
ruthless
stern
thrawn
undaunted
obstructive
unsparing
disobliging
imperious
dictatorial
domineering
pitiless
sedulous
severe
emphatic
full of determination
wild
driven
die-hard
brassbound
wrong-headed
unhelpful
unchangeable
exacting
narrow-minded
authoritarian
bold
bigoted
intolerant
immutable
mettlesome
merciless
unalterable
stable
fanatical
cruel
gritty
hard and fast
perseverant
diligent
vexatious
overbearing
unswayable
serious
opinionative
biased
dyed-in-the-wool
mutinous
blinkered
deliberate
ardent
doctrinaire
plucky
unappeasable
bound and determined
bent upon
gutsy
pushy
spunky
demanding
cocksure
patient
bent
unforgiving
faithful
unchanging
sure
definite
four-square
loyal
devoted
hard-core
purposive
illiberal
tyrannical
mule
do-or-die
manful
arbitrary
zealous
bent on
draconian
bulldog
brave
arrogant
hell-bent on
self-assertive
hard as nails
hell-bent upon
noncompliant
devout
courageous
resistant
focused
US
locked
indocile
invariable
small-minded
strenuous
aggressive
enduring
immobile
settled
valiant
avid
keen
critical
unpredictable
oppressive
dour
pontifical
incorrigible
trying
stout-hearted
unbreakable
unwilling
incontrollable
undisciplinable
opinioned
true-blue
stuffy
persisting
out
unswervable
iron-fisted
fierce
rugged
partisan
focussed
UK
heavy-handed
sturdy
one-sided
meaning business
feisty
dependable
irritable
go-getting
hard-and-fast
capricious
haughty
exigent
reliable
pompous
clamorous
ambitious
unremitting
pressing
unfailing
picky
imperative
nagging
trustworthy
disciplinary
trusty
fast
motivated
insuppressible
unrestrainable
insurgent
uptight
hidebound
puritanical
obstinately disobedient
obsessed
insular
good
enterprising
self-important
hungry
dogmatical
unpermissive
dire
unflappable
allegiant
ill-natured
crabby
obsessive
monomaniacal
disorderly
fussy
enthusiastic
tough nut
industrious
eager
unmoving
robust
thirsty
desirous
active
categorical
inspired
unamenable
compulsive
positive
not giving an inch
established
perfectionist
brick-wall
delinquent
provincial
high-pressure
ironclad
disputatious
aspiring
no-nonsense
narrow
energetic
magisterial
entrenched
possessive
militant
dug in
stand pat
wholehearted
sectarian
hardy
assured
argumentative
querulous
hang tough
confident
unsympathetic
hard to please
unabated
unqualified
discriminatory
standing pat
chauvinistic
stand one's ground
austere
as stubborn as a mule
hypercritical
prickly
cynical
antipathetic
negative
strait-laced
hell bent on
touchy
self-starting
hard-driving
uncharitable
changeless
of fixed views
chippy
goal-oriented
never-failing
snappy
intense
stop at nothing
over-particular
self-driven
cast-iron
hard to handle
hell-bent
formidable
hard to satisfy
self-confident
irrational
illogical
inveterate
unbudgeable
incurable
contentious
unconverted
unreformed
mullish
estranged
seditious
disaffected
factious
irreconcilable
alienated
firmly-based
unsubduable
incommutable
stiffened
frozen
petrified
intrepid
durable
immalleable
forbidding
insoluble
thorny
unpliable
problematic
knotty
impassive
unstoppable
game
unsoftened
unresponsive
unmoved
heady
fossilized
US
bony
indurated
rigidified
unreceptive
boneheaded
peevish
morose
truculent
stony-hearted
unimpressionable
convinced
never-tiring
great
hellbent
aloof
proud
uncontainable
irrepressible
unmodifiable
permanent
quiescent
cohesive
sticky
pounding
mortal
hard-headed
shrewish
fossilised
UK
unplacatable
iron-handed
unmollifiable
inescapable
unpacifiable
coherent
belligerent
down-the-line
pious
stanch
insubmissive
radical
opposing
resisting
withstanding
inalterable
iron-jawed
unregenerate
steel
exasperating
unforgetful
hard-shell
locked-in
set-on
intent on
of preconceived ideas
peremptory
thick-skinned
toughened
in for long haul
like bad penny
unflexible
crisp
ineluctable
cast iron
set on
lusty
unconditional
hearty
erratic
fickle
stick to guns
set in concrete
on one's mettle
insistent on
intent upon
determined to
committed to the idea of
clear-sighted
all out
flat out
straight out
irreversible
exact
concrete
necessary
compulsory
dissident
hostile
contrariant
nonconforming
discordant
arsey
nonconformist
paradoxical
adverse
disagreeing
antagonistic
unvacillating
unvarying
static
ramrod
abiding
liege
unquestioning
tried-and-true
do or die
hold one's ground
hold the fort
sticking to one's guns
standing one's ground
hold the line
high-handed
authoritative
wrongheaded
inimical
converse
dissentient
judgmental
disapproving
untameable
consumed
compelled
pesky
vexing
thick
heavy
insensible
resilient
unquestionable
downright
unchallengeable
disciplinarian
callous
drastic
ascetical
by the book
absolute
astringent
hard-hearted
browbeating
extreme
rough
ascetic
autocratic
grave
mean business
striving
possessed
decided upon
writ in stone
cut-and-dried
competitive
set in your ways
whole-hearted
overexacting
cavilling
UK
turbulent
violent
non-compliant
impossible
unbearable
undependable
intolerable
dynamic
rock hard
galvanized
US
impelled
no going back
determinate
dominant
certain
in earnest
difficult to handle
cramped
complex
bulky
discommodious
incommodious
disagreeable
nonmoving
cutthroat
sustained
ferocious
despotic
fascistic
unequivocal
formal
egotistical
dictative
prevailing
inexpugnable
seasoned
out of control
induced
fixated
obsessional
quibbling
disparaging
sticklerish
faultfinding
overscrupulous
needy
hairsplitting
caviling
US
censuring
cavillous
unbudging
progressive
bloodthirsty
pioneering
explicit
consistent
going
naughty
errant
immoral
aberrant
like death and taxes
high and mighty
patriotic
nonmotile
warlike
gladiatorial
brutal
scrappy
freaked
like a loose cannon
excited
overwhelming
beside oneself
badly-behaved
abandoned
lawless
overpowering
pushed
steered
guided
impulsive
besetting
galvanised
UK
dutiful
demeaning
carping
censorious
clamant
urgent
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
fastidious
boorish
finicky
fervent
trusted
badly behaved
over-rigorous
fault-finding
over-strict
over-exacting
over-censorious
high-maintenance
through-and-through
doughty
oafish
bearish
irascible
discontented
dissatisfied
self-indulgent
urged on
irremovable
genuine
superior
tough as old boots
red-blooded
two-fisted
high-powered
as tough as old boots
hard-bitten
impassioned
supportive
vexed
testy
choosy
captious
temperamental
quarrelsome
disputative
huffy
delicate
overcritical
particular
ungracious
grumbly
finical
invidious
fiendish
sensitive
crotchety
uppity
sour
rude
irritating
impolite
reactionary
close
instant
burning
crying
emergent
acute
compelling
entreating
necessitous
condescending
bloated
pretentious
perfervid
fervid
localist
small-town
secure
passionate
petty-minded
close-minded
inward-looking
short-sighted
myopic
portentous
apostolic
prelatic
ecclesiastical
papal
disturbing
solicitous
suppliant
overeager
harassing
anchored
rooted
restricted
petty
limited
true-hearted
nailed
quiet
hitched
hooked
situated
attached
stationary
still
located
tight
moralistic
prim
prudish
priggish
starchy
tried and true
true to life
tried and tested
swaggering
episcopal
grandiose
pontificating
puffy
made fast
picayune
prissy
puritan
blimpish
parochial
racist
Lilliputian
claustral
chauvinist
parish-pump
jerkwater
small
shockable
partial
unfair
xenophobic
overly solicitous
racialist
unjust
indignant
averse
contemptuous
waspish
unforbearing
outraged
short-fuse
individualistic
irate
upset
hateful
jaundiced
unindulgent
worked-up
disdainful
tilted
fearless
heroic
gallant
daring
lionhearted
audacious
valorous
dauntless
vehement
gutty
ballsy
stouthearted
undauntable
heroical
greathearted
unshrinking
unafraid
muscular
adventurous
intensive
conclusive
go-ahead
potent
concentrated
fiery
conscientious
lion-hearted
resounding
all-out
unassailable
unambiguous
nervy
sound
forcible
hard-working
in the bag
manly
painstaking
undeniable
daredevil
commanding
deep
bullish
pushing
definitive
thorough
known
clear
unmistakable
have-a-go
real
unwearied
unabashed
supreme
unalarmed
undismayed
evident
indisputable
sincere
inexhaustible
guaranteed
irrefutable
final
infallible
predestined
destined
laborious
incontrovertible
hard-hitting
weariless
indubitable
occupied
driving
incontestable
hopeful
flat
bossy
venturous
complete
out-and-out
direct
Herculean
total
undoubted
on the make
plain
demonstrable
inarguable
unfearful
incessant
unerring
confirmable
verifiable
provable
establishable
ascertained
safe
full
undisputable
thoroughgoing
forward
unrestrained
self-reliant
as game as Ned Kelly
concerted
effective
redoubtable
salted away
on ice
sure thing
outright
having down pat
punchy
studious
express
responsible
strapping
unwearying
unfluctuating
venturesome
jumping
grind
perky
engaged
chivalrous
influential
high-spirited
fire-eating
furious
plugging
regular
well-built
careful
death-or-glory
pulling no punches
persuasive
absorbed
engrossed
obvious
exhaustive
convincing
attentive
on the go
continuous
preoccupied
concentrating
macho
immersed
busy
specified
blunt
uncontrolled
unbridled
independent
comprehensive
brassy
undivided
noble
invincible
virile
masculine
male
unceasing
defined
precise
unblinking
unconquerable
unstinting
meticulous
unlimited
unmitigated
entire
hyper
determining
distinct
tried
unalloyed
unadulterated
utter
unarguable
scrupulous
minute
undeterred
profound
dreadful
unstinted
dashing
resourceful
irrefragable
unanswerable
ultimate
searching
elaborate
accomplished
bustling
combative
serious-minded
pushful
brisk
heartfelt
even
uniform
hopping
employed
working
tied-up
honest
confirmed
watertight
wrapped up
deep-dyed
well-founded
tough-minded
spartan
invariant
proven
assaultive
predetermined
hardworking
vicious
exquisite
terrible
decreed
unfearing
carnivorous
prescribed
predictable
beyond dispute
carefree
herolike
calculable
beyond doubt
trustable
beyond question
ball of fire
desiring success
like a ball of fire
not backward in coming forward
beyond a shadow of a doubt
proactive
self-disciplined
mature
ended
predisposed
tending
inclined
leaning
disposed
repeated
immoveable
professional
bombproof
realistic
unintimidated
not joking
hardboiled
buckled down
awesome
restless
vital
sworn
sedate
sensible
unbeatable
bitter
unblenching
sporting
observant
uninfluenced
swashbuckling
unending
unretiring
unquenchable
granite
pleading
worthy
all
exclusive
enrapt
whole
butch
Ramboesque
ultra-careful
perseverative
unsentimental
thrusting
aweless
unthinking
quick
hasty
snap
frightless
beseeching
begging
self-motivated
sagacious
watchful
alert
grand
magnanimous
puissant
unsinkable
indelible
ingrained
arduous
taxing
punctilious
impavid
adventuresome
martial
Trojan
cool
temerarious
unsurpassable
impregnable
invulnerable
single-minded about
firm about
exhausting
resolute about
orped
telelogical
calculated
productive
athletic
manifest
patent
pedantic
religious
believing in oneself
perceptive
take charge
careerist
undiscouraged
lively
straight
going all the way
in place
in position
airtight
self-evident
clinching
undefeated
husky
hefty
go-go
continuing
fireball
continued
plodding
imprudent
chin-up
foolhardy
fortitudinous
meaning what one says
nose to grindstone
insurmountable
bulletproof
insuperable
firm in spirit
animated
peppery
gingery
desperate
stand tall
cocky
unconcerned
unworried
undisturbed
icy
unapprehensive
optimistic
intending
aspirant
wannabe
potential
would-be
budding
wishful
undebatable
clear-cut
self-respecting
resolved to
never give up
sinewy
beefy
brawny
obsessive about
inflexible about
fixated on
fanatical about
frisky
sprightly
mettled
riveted
playing hard ball
undefeatable
impassable
keen as mustard
agreed
not discouraged
future
possible
prospective
likely
deep-rooted
long-standing
deep-seated
bred-in-the-bone
intrenched
arranged
preset
constructive
formative
creative
developmental
foundational
seminal
emulous
reiterative
monotonous
steamroller
powerhouse
powerfully built
burly
substantial
insistent about
be out for blood
nose to the grindstone
extremely motivated
very motivated
allotted
prearranged
not in doubt
apodictic
enthralled
vying
operose
involved
longing
not put off
nothing daunted
detailed
in-depth
obscene
pornographic
X-rated
planned
shoo-in
unanxious
undoubtful
sanguine
easy
nailed down
able
locked on
competing
impatient
racy
storming
coming on strong
imposing
all-absorbing
all-inclusive
all-encompassing
expectant
endeavoring
US
endeavouring
UK
determinant
warring
oppositional
effectual
malevolent
maleficent
malicious
spiteful
malign
quantified
controlling
stipulated
stated
Type A
triumphant
ringing
glaring
significant
stressed
important
solemn
trenchant
impressive
pointed
sober
cogent
accented
unnatural
mannered
all-embracing
methodical
unwaivering
in full swing
busy as a bee
psyched up on
one hundred per cent
unreserved
collected
composed
not subject to change
unrestricted
explosive
ghastly
sweeping
blistering
almighty
heavy-duty
excruciating
fearsome
widespread
frightful
extensive
hellacious
fearful
no mistake
spoiling for a fight
on the warpath
ready for action
poised
crucial
for a face
mannish
stud
jockstrap
beefcake
hunk
jock
tiger
manlike
colt
stately
he-man
dignified
accelerated
speeded-up
unbowed
unfeigned
undiluted
warm
high-octane
authentic
fullhearted
decent
upright
with gritted teeth
posed
cool-headed
full-scale
honorable
US
unimpeachable
honourable
UK
truthful
reputable
impeccable
respectable
righteous
high-principled
determinative
bellicose
pugnacious
highly motivated
veracious
incorrupt
clean
maximum
confrontational
brawly
agonistic
hundred percent
whole-souled
bona fide
crashing
deadly
cotton-picking
optimum
stark
plumb
simple
sheer
arrant
rank
bodacious
dead
full-on
categoric
blank
very
consummate
flat-out
pure
stone
straight-out
fair
perfect
blooming
without reservations
unavoidable
flip
hot-tempered
have a bone to pick
on the outs
at loggerheads
hot
have chip on shoulder
battling
fighting
have it in for
full-blown
unpreventable
fated
imminent
preordained
foreseeable
impending
expected
ineludible
ordained
obligatory
fateful
impreventable
required
unescapable
mandatory
foreordained
doomed
irrevocable
natural
ineliminable
to be expected
bound to happen
in the cards
irresistible
without recourse
sure to happen
for sure
for certain
no ifs ands or buts
inevasible
inevitable
all locked up
to be anticipated
certain to happen
binding
open and shut
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
draconian
cruel
stiff
relentless
hard-nosed
flinty
obstinate
constant
established
unsparing
extreme
entrenched
oppressive
stubborn
merciless
stable
unsympathetic
grim
settled
pitiless
steady
intractable
solid
ironclad
dyed-in-the-wool
unforgiving
ruthless
hard-hearted
dogged
iron-fisted
incommutable
unfeeling
brutal
callous
staunch
inalterable
implacable
stony
rough
tenacious
no-nonsense
serious
uniform
rooted
hard-boiled
deep-rooted
radical
illiberal
heartless
indurate
tight
grave
hard-core
hardline
inhuman
savage
fierce
unmerciful
permanent
diehard
hardheaded
binding
uncharitable
dour
demanding
enduring
abiding
unmodifiable
deep-seated
solemn
forceful
inveterate
steely
stiff-necked
drastic
unsmiling
final
unfluctuating
hardened
determinate
insensitive
unpitying
winner-take-all
zero-sum
decided
stony-hearted
adamantine
disciplined
consistent
regular
confirmed
ingrained
long-standing
headstrong
perpetual
inhumane
sedate
staid
rugged
remorseless
even
fast
win-or-lose
all-or-nothing
onerous
barbarous
unvaried
despotic
humourless
UK
humorless
US
sober
lasting
unfailing
invariant
uncomic
cold-blooded
strong
earnest
inexpugnable
dedicated
sobersided
flat
punishing
sadistic
frozen
intolerant
certain
uncaring
picky
sure
same
confining
by the book
weighty
astringent
tyrannical
forbidding
persistent
absolute
die-hard
ordered
equable
unmovable
hardhanded
hidebound
po-faced
deep-dyed
ossified
committed
disciplinary
incontrovertible
deep
stuffy
faithful
pertinacious
bred-in-the-bone
intrenched
devoted
indomitable
cold
explicit
predictable
immoderate
brutish
monolithic
unshakable
imperious
desperate
systematic
unemotional
excessive
murderous
punitive
unrelieved
dire
pigheaded
monotonous
stationary
thick-skinned
compassionless
desensitized
US
soulless
case-hardened
pachydermatous
insensate
stonyhearted
stoney
affectless
slash-and-burn
take-no-prisoners
cut-throat
ironhearted
undiversified
habitual
ineradicable
unchanged
hard-hitting
true
reliable
unkind
mean
autocratic
truculent
tyrannous
sustained
ageless
level
dead set on
ferocious
unappeasable
businesslike
domineering
unremitting
well-set
desensitised
UK
vindictive
hardhearted
unflinching
mulish
stabile
stand pat
resolved
unqualified
never-failing
solid as a rock
high stakes
pass-fail
clear-cut
incontestable
high-stake
regimented
controlled
spartan
impenetrable
fanatical
unbreakable
ironhanded
Draconian
uptight
reactionary
traditionalist
conservative
hard to please
closely controlled
strictly controlled
rigidly enforced
heavy
meticulous
scrupulous
painstaking
ungiving
militant
puritanical
violent
tormenting
maleficent
wolfish
torturous
barbaric
ultra-conservative
unprogressive
fossilized
US
punitory
remove
regimental
compelling
poignant
valid
powerful
acrimonious
drawing
convincing
brick-wall
formal
eternal
embedded
unmoved
fell
unpersuadable
abusive
dictatorial
jelled
unflappable
lacking compassion
cold-hearted
with a heart of stone
unitary
undifferentiated
cast iron
suppressive
not changeable
fixed as the laws of the Medes and the Persians
reserved
disciplinarian
ascetical
browbeating
formidable
ascetic
pressing
iron
unswayable
uncompliant
gratuitous
cutthroat
mortal
uncalled-for
wanton
dog-eat-dog
loyal
unfriendly
frigid
chilly
icy
frosty
durable
not giving an inch
vicious
virulent
forcible
biased
critical
complex
rule-bound
distant
aloof
blimpish
implanted
unfaltering
stand one's ground
continuous
uninterrupted
by the numbers
preconceived
fossilised
UK
hard-shell
louring
gruff
hatchet job
mean machine
having a killer instinct
set in one's ways
willful
self-willed
inconvincible
pat
perverse
iron-willed
self-opinionated
impassive
strong-willed
wilful
opinionated
agreed
calm
indelible
irremovable
well-established
sacrosanct
complicated
grounded
firmly established
ceaseless
unabated
unabating
incessant
never-ending
continuing
interminable
unceasing
continual
non-stop
arranged
preset
remote
intimidating
lowering
independent
unimpressionable
unshaken
rock-ribbed
well grounded
predetermined
allotted
specified
prearranged
dependable
sombre
UK
ungentle
somber
US
overbearing
tactless
imperishable
unfading
based on
long-lived
staying put
deeply felt
tough nut
stick to guns
set in concrete
dug in
quiescent
fogyish
stick-in-the-mud
conformist
defined
decreed
precise
prescribed
bureaucratic
officious
involved
obscene
pornographic
X-rated
mean-looking
express
planned
high-handed
never-changing
unblinking
unsentimental
irrevocable
unquestionable
absolutist
thoughtless
inconsiderate
definitive
stipulated
still
stated
cool
unwaivering
good
true-blue
pious
stalwart
down-the-line
trusty
stanch
devout
in the bag
not subject to change
inept
undiplomatic
bungling
authoritative
fixed as the laws of the Medes and Persians
similar
refractory
pugnacious
persevering
overstrict
coercive
OTT
equivalent
identical
matching
two-fisted
hard-bitten
homogeneous
equal
tried-and-true
allegiant
trustworthy
intense
wholehearted
ardent
liege
immobile
unquestioning
intent
hard-shelled
over the top
straight
fated
symmetrical
unbroken
orderly
consonant
incorrigible
fateful
well-proportioned
of a piece
normal
compatible
plumb
methodical
smooth
well-balanced
non-relative
non-variable
not changing
in black and white
monstrous
coldhearted
hurtful
bloodthirsty
vengeful
bestial
trying
excruciating
burdensome
nasty
grievous
bitter
repressive
searing
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
tickler
crossword
jigsaw
quiz
key
ambiguity
anagram
unknown
gateway
stinker
example
illustration
bugaboo
query
sixty-four thousand dollar question
cliff-hanger
word game
tangle
jungle
morass
web
convolution
jumble
turn
twist
hotchpotch
mishmash
hodgepodge
coil
muddle
skein
mesh
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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