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What is another word for
fail-safe
?
Need
synonyms for fail-safe
? Here's a list of
similar words
from our
thesaurus
that you can use instead.
Contexts
▼
▲
Adjective
Infallible or not very likely to fail
Guaranteed not to fail
(
of a product
)
Consistently good in quality or performance
Having an outcome which is certain or beyond doubt
Accurate or reliable, especially in terms of information provided
Noun
A measure taken in advance to prevent something dangerous, unpleasant, or inconvenient from happening
Safety precaution
… more ▼
▲
Adjective
▲
Infallible or not very likely to fail
sure
infallible
certain
unfailing
surefire
can't-miss
dependable
guaranteed
foolproof
reliable
sure-fire
assured
safe
trustworthy
effective
sound
efficacious
tried and true
tried and tested
never-failing
definite
good
excellent
steady
solid
watertight
unbeatable
positive
acceptable
correct
handy
apodictic
incontrovertible
satisfactory
helpful
authoritative
unquestionable
exact
useful
always effective
never failing
effectual
inerrant
efficient
satisfying
right
tested
unerring
sovereign
accurate
decided
stipulated
stated
insured
concluded
warranted
certified
ensured
more ❯
Adjective
▲
Guaranteed not to fail
confident
covered
dependable
foolproof
goofproof
guaranteed
protected
reliable
reliant
safeguarded
secure
sound
safe
trustworthy
sure
tested
tried
unfailing
certain
infallible
effective
efficacious
unerring
watertight
perfect
flawless
unassailable
tried and true
airtight
never-failing
tried and tested
never failing
faultless
unbreakable
sure-fire
idiot-proof
Adjective
▲
(
of a product
)
Consistently good in quality or performance
reliable
dependable
safe
failsafe
good
well-built
well-engineered
high-quality
well engineered
tried and tested
tried and true
trustworthy
proven
tested
established
tried
proved
reputable
sure
true
certain
steady
solid
faithful
unfailing
tried-and-true
certified
trusted
steadfast
sound
secure
calculable
trusty
attested
trustable
staunch
consistent
constant
demonstrated
demonstrable
foolproof
time-tested
well-founded
well-grounded
tested and proved
well-tried
legit
infallible
loyal
surefire
unerring
enduring
absolute
unchanging
unshakable
undying
unlimited
unfading
abiding
delivering
diligent
straight
assiduous
never-failing
can't-miss
always there
dyed-in-the-wool
rock solid
counted on
responsible
recognized
US
approved
classic
used
recognised
UK
tried out
time-honoured
put to the test
safe as houses
true-blue
more ❯
Adjective
▲
Having an outcome which is certain or beyond doubt
guaranteed
certain
sure
definite
affirmed
sealed
cast-iron
sure-fire
a lock
in the bag
on ice
for sure
sure enough
for a fact
assured
firm
confirmed
unimpeachable
certified
established
watertight
unshakable
settled
fixed
secured
bound
attested
copper-bottomed
iron-clad
nailed-on
categorical
unfailing
infallible
conclusive
undeniable
irrefutable
unambiguous
inevitable
unequivocal
clear
absolute
indisputable
decisive
incontrovertible
unerring
authoritative
true
concrete
unmistakable
indubitable
genuine
palpable
irrevocable
foolproof
recognized
US
confirmable
real
resolute
unquestionable
patent
doubtless
verifiable
manifest
surefire
obvious
secure
determinate
incontestable
demonstrable
positive
undoubted
accurate
unqualified
solid
convincing
questionless
safe
transparent
recognised
UK
inerrant
precise
failsafe
can't-miss
as sure as eggs is eggs
set
decided
agreed
inflexible
preset
arranged
unchangeable
allotted
predetermined
specified
prearranged
defined
determined
prescribed
unalterable
decreed
inalterable
express
frozen
invariable
explicit
immutable
exact
final
incommutable
unwavering
planned
flat
hard
steady
inexpugnable
stable
irreversible
abiding
unmovable
unbending
unmodifiable
hard-and-fast
undeviating
still
enduring
unblinking
definitive
stipulated
inveterate
stated
writ in stone
never-failing
rigid
resolved
hard and fast
not subject to change
more ❯
Adjective
▲
Accurate or reliable, especially in terms of information provided
definitive
authentic
valid
accurate
reliable
sound
true
dependable
trustworthy
authoritative
factual
precise
convincing
credible
thorough
veracious
correct
exact
certified
faithful
believable
faultless
safe
errorless
failsafe
infallible
kosher
unerring
truthful
verifiable
veritable
authenticated
circumstantiated
legit
proper
proven
solid
supported
validated
verified
compelling
well-founded
on the money
without error
irrefutable
unimpeachable
unquestionable
all right
good
attested
from the horse's mouth
confirmed
genuine
learned
scholarly
documented
respected
copper-bottomed
straight from horse's mouth
sure
definite
stable
certain
well grounded
more ❯
Noun
▲
A measure taken in advance to prevent something dangerous, unpleasant, or inconvenient from happening
safeguard
precaution
preventive
palladium
caution
protection
security
defence
UK
defense
US
shield
insurance
preventive measure
guard
screen
deterrent
provision
buffer
safety device
safety net
safety measure
protector
safety valve
fallback
protective umbrella
sheet anchor
safety plug
cover
armor
US
ward
aegis
bulwark
wall
ammunition
shelter
hindrance
egis
buckler
block
preventative
impediment
obstruction
indemnity
surety
curb
check
restraint
armour
UK
prevention
remedy
protective
armament
prophylactic
obstacle
neutralizer
disincentive
precautionary measure
anticipatory measure
protective measure
backstop
preventative measure
belt and braces
care
refuge
safety
sanctuary
fortification
safeguarding
haven
shielding
guarding
immunity
support
stronghold
barrier
preservation
asylum
safekeeping
fence
conservation
guardianship
resistance
retreat
salvation
cushion
bastion
rampart
hiding place
shade
citadel
upkeep
safe harbour
UK
keeping
weapon
safe harbor
US
bumper
safe house
barricade
deterrence
safeness
buttress
protecting
weaponry
stockade
upholding
arms
saving
breastwork
embankment
parapet
fortress
munitions
assurance
fastness
palisade
earthwork
fort
shock absorber
hideaway
safe keeping
outwork
harbour
UK
harbor
US
hideout
circumvallation
harborage
vallum
hermitage
cloister
vallation
safe haven
hidey-hole
secret place
port in a storm
invulnerability
reinforcement
strength
hedge
guarantee
warranty
absorber
reassurance
stability
insurance cover
force field
self-defense
backing
shadow
barbican
warfare
bartizan
custody
a roof
defender
battlement
charge
supporter
supervision
maintenance
something to fall back on
custodianship
mainstay
prop
lee
defensive wall
elevation
conserving
trust
keep
preserving
tutelage
hiding
concealment
housing
sustentation
surveillance
safe space
preserval
guns
weapons
storage
armaments
resort
perpetuation
retention
care and feeding
den
hardware
haunt
cottage
dacha
sanctum
arsenal
nest
lair
oasis
cabin
bolt-hole
safe place
adytum
place of safety
sanctum sanctorum
place of security
ordnance
firepower
redoubt
partition
buffet
berm
more ❯
Noun
▲
Safety precaution
safety valve
overflow
valve
safety device
safety precaution
insurance
shield
guard
screen
protection
safety net
preventive measure
safety plug
sheet anchor
buffer
fallback
protective umbrella
safeguard
cover
bulwark
armor
US
ward
aegis
wall
buckler
ammunition
egis
armament
armour
UK
bumper
rampart
pad
cushion
fender
fence
protective device
safety
safety guard
defence
UK
security
defense
US
precaution
preventive
shelter
palladium
provision
indemnity
surety
prophylactic
caution
safety measure
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fail-safe
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?
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?
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?
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Nearby Words
fail-safes
fails at
fails heavily
fails miserably
fails to
fails to agree
failsafe
fails
failproof
failovers
failover
fail miserably
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fail-safe
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