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What is another word for
unsustainable
?
Need
synonyms for unsustainable
? Here's a list of
similar words
from our
thesaurus
that you can use instead.
Contexts
▼
▲
Incapable of being maintained or used over a long period of time
Not able to be maintained or defended against attack or objection
Very difficult to deal with
Unconvincing from a logical perspective
Not economically viable or feasible
Lacking in accuracy or truth
… more ▼
▲
Adjective
▲
Incapable of being maintained or used over a long period of time
unmanageable
unmaintainable
unsuitable
unfeasible
unworkable
indefensible
unjustifiable
unsanctionable
untenable
unverifiable
unviable
unendurable
brief
fleeting
implausible
temporary
“Generating power through the use of fossil fuels is both
unsustainable
and environmentally damaging.”
Adjective
▲
Not able to be maintained or defended against attack or objection
untenable
unjustifiable
indefensible
insupportable
unjustified
unwarranted
weak
flawed
invalid
shaky
defective
unsound
undefendable
unacceptable
inadmissible
unarguable
unsupportable
inexcusable
unforgivable
unpardonable
unwarrantable
unreasonable
gratuitous
unnecessary
inexpiable
unprovoked
outrageous
wrong
excessive
unconscionable
immoderate
blameworthy
reprehensible
regrettable
unworthy
culpable
remiss
censurable
bad
uncalled for
uncalled-for
without justification
without reason
without cause
more ❯
Adjective
▲
Very difficult to deal with
impossible
intolerable
unbearable
excruciating
painful
agonising
UK
agonizing
US
insufferable
insupportable
oppressive
unacceptable
awful
horrendous
undesirable
unendurable
unsupportable
too much to bear
too much
beyond endurance
past bearing
a bit much
beyond bearing
not to be borne
no-win
enough to try the patience of a saint
enough to try the patience of Job
inadmissible
enough
unsurpassable
overpowering
last straw
heavy-handed
unsufferable
overwhelming
unmanageable
dreadful
unspeakable
offensive
inexcusable
final straw
enough already
killing
enough to tax the patience of a saint
enough to test the patience of a saint
beyond the pale
more than flesh and blood can stand
more than one can stand
more than one can bear
more ❯
Adjective
▲
Unconvincing from a logical perspective
weak
implausible
preposterous
questionable
tenuous
unconvincing
untenable
dubious
flawed
improbable
irrational
unbelievable
unpersuasive
unreasonable
vague
absurd
contradictory
doubtful
farfetched
far-fetched
faulty
feeble
flimsy
illogical
inadequate
inconclusive
incredible
lame
ludicrous
nebulous
nonsensical
poor
suspect
unlikely
unsatisfactory
unsound
unsubstantiated
false
fantastic
fishy
groundless
hollow
impossible
inconceivable
incongruous
indefensible
invalid
irreconcilable
obscure
puzzling
senseless
shaky
sketchy
specious
spurious
unsupportable
airy
fallacious
fatuous
illegitimate
inconsequent
inconsequential
nonrational
nutty
pathetic
problematic
reachy
slight
thin
unfounded
unimpressive
unreasoned
unreasoning
vain
wacky
full of holes
off the wall
self-contradictory
won't hold water
won't wash
unsubstantial
iffy
unimaginable
unsupported
defective
unthinkable
fanciful
unreliable
uncertain
wrong
ridiculous
baseless
dodgy
debatable
unjustifiable
shallow
silly
stupid
incredulous
uncompelling
incorrect
erroneous
hard to swallow
difficult to believe
incoherent
open to doubt
fallible
paltry
daft
idiotic
trifling
foolish
undependable
inane
fantastical
insubstantial
beyond belief
not likely
slim
half-baked
superficial
inaccurate
insufficient
unconceivable
frail
crazy
remote
insane
disputable
brainless
frivolous
flakey
US
flaky
UK
dubitable
mad
open to question
inconsistent
fragile
ungrounded
imperfect
scarcely credible
equivocal
unrealistic
unjustified
without foundation
hundred-to-one
untrue
not expected
without basis
kooky
untrustworthy
unclear
ill-founded
foundationless
imbecilic
uncorroborated
harebrained
unconfirmed
hard to believe
sophistic
unscientific
suspicious
unwise
full of it
controvertible
amiss
wishful
ineffectual
cock-and-bull
laughable
weakly
rare
loony
arguable
transparent
shady
injudicious
vapid
imprecise
witless
asinine
unimagined
flat
unintelligent
mistaken
unstable
phony
US
outside
moronic
faint
outlandish
distorted
distant
off
cockamamie
phoney
UK
unwarranted
wide of the mark
incogitable
too much
for the birds
insupportable
deficient
mindless
doubtable
ill-considered
indecisive
indefinite
meager
US
casuistic
inept
bad
hazy
tame
thoughtless
chancy
risky
rocky
disreputable
inexact
conjectural
barmy
meagre
UK
arbitrary
deceptive
problematical
disjointed
unacceptable
speculative
reasonless
unbacked
controversial
incomplete
lunatic
queer
dotty
meaningless
unapt
extraordinary
dippy
unestablished
staggering
impracticable
labored
US
laboured
UK
daffy
pseudo
sham
impaired
suppositive
suppositious
strained
tall
bleak
strange
indistinct
zany
imprudent
cockeyed
screwy
forced
incomprehensible
faltering
off-target
beyond the bounds of possibility
confused
unheard of
unintelligible
indiscreet
incautious
doltish
mind-boggling
mind-blowing
not convincing
jerky
far out
dim
tomfool
cock and bull
unreal
slim and none
simple
reaching
infeasible
softheaded
feebleminded
nerdy
unearthly
short-sighted
ill-advised
half-witted
ill-defined
insecure
threadbare
inexcusable
dicey
unforgivable
unspecific
insignificant
unpardonable
unsuccessful
indeterminate
undefendable
unwarrantable
all wet
unsafe
contrived
inauthentic
shoddy
inadmissible
light
weak-kneed
exiguous
minute
unarguable
exaggerated
wrongly deduced
wrongly inferred
duff
contemptible
assailable
bizarre
ponderous
cockamamy
contentious
borderline
extravagant
outrageous
loopy
fairy-tale
unsure
embellished
unthinking
without justification
unsettled
misleading
overblown
wild
sensational
fabricated
untruthful
hyperbolic
farcical
issuable
moot
spectacular
falsified
fake
lacking substance
half-hearted
not reliable
not dependable
astonishing
amazing
unplausible
embroidered
in doubt
negotiable
hard to take
slender
eye-popping
scatterbrained
lamebrained
past belief
jaw-dropping
subject to debate
open to debate
open to suspicion
demented
blown up
freaky
sophistical
aberrant
distraught
raving
counterintuitive
disconnected
delirious
off-the-wall
feeble-minded
ambiguous
perverse
unproved
irrelevant
unconnected
enigmatic
blurred
off beam
way out
unknowable
insupposable
imcomprehensible
not following
not making sense
woolly
UK
bleary
foggy
cloudy
unheard-of
unproven
out of the question
shadowy
perplexing
wooly
US
fuzzy
pointless
extremely implausible
extremely unlikely
extremely doubtful
beyond reason
won't fly
extremely difficult to believe
unverified
hesitating
halting
not in the least likely
risible
not to be thought of
puerile
goofy
nonvalid
awry
dumb
stuttering
stammering
inarticulate
vacuous
sappy
damfool
gormless
unattested
futile
glaikit
cretinous
childish
unfit
infantile
divvy
blemished
presumed
assumed
dof
empty
warped
immature
botched
purposeless
tainted
cracked
worthless
not validated
garbled
stumbling
vacant
insipid
crass
innocuous
injured
empty-headed
wishy-washy
devoid of intelligence
debased
rank
leaky
not backed up by evidence
malformed
blamable
below par
mumbled
muttered
broken
hesitant
poorly spoken
simpleminded
cuckoo
crackpot
lunkheaded
bubbleheaded
looney
whacky
kookie
screwball
hare-brained
featherheaded
balmy
weak-minded
weird
unusual
odd
oddball
peculiar
curious
fool
impractical
offbeat
comical
potty
reckless
batty
eccentric
rash
crackbrained
funny
quirky
anomalous
quaint
uncanny
foolhardy
impulsive
irresponsible
abnormal
atypical
dim-witted
illusory
thickheaded
unconventional
dopey
birdbrained
hasty
unworkable
out of the ordinary
delusory
unique
misguided
romantic
erratic
unfeasible
uncommon
heedless
derisory
derisive
naive
dunderheaded
lamebrain
far-out
ill-conceived
cock-eyed
out-of-the-way
non-viable
careless
unorthodox
mystifying
remarkable
clueless
idealistic
slow-witted
unexpected
nuts
different
shocking
singular
mysterious
bizarro
halfwitted
freakish
inexplicable
unbalanced
grotesque
gonzo
queerish
negligent
obtuse
outré
chowderheaded
dotish
chuckleheaded
boneheaded
off-key
idiotical
pinheaded
especial
aberrated
freak
way-out
out to lunch
uncustomary
off-kilter
make-believe
unpredictable
random
brain-dead
thick-witted
incongruent
visionary
impetuous
wacko
capricious
bonkers
imaginary
exorbitant
crackers
deviant
unhinged
scatty
fruity
rum
hilarious
extreme
whimsical
unattainable
dense
madcap
utopian
grandiose
cranky
kinky
funky
improvident
impolitic
weirdo
unconsidered
clownish
comic
monstrous
featherbrained
fruitless
blind
inconsiderate
dull
perfectionist
idiosyncratic
unwonted
shortsighted
theoretical
imbecile
thick
oafish
slow
surprising
astounding
off-centre
out there
flighty
nonrealistic
bonehead
opaque
unsmart
stupendous
unfamiliar
dorky
knuckleheaded
airheaded
dopy
unco
unaccustomed
gnarly
contrary to reason
spaced-out
soft
ivory-tower
feather-brained
hardly possible
out of this world
wooden-headed
pea-brained
mythical
twisted
rambling
wandering
refutable
uninformed
neurotic
inappropriate
ill-thought-out
muttonheaded
haphazard
superstitious
motiveless
unmotivated
derisible
braindead
surreal
tearaway
giddy
dappy
blockheaded
worthy of scorn
Bohemian
wanton
extremely foolish
shot-in-the-dark
hit-or-miss
soft in the head
stupidly irresponsible
amusing
not well thought out
insensate
stolid
wrong-headed
donkeyish
obstinate
idealized
US
idealised
UK
offhand
eerie
unnatural
pathological
ambitious
artificial
instinctive
unsystematic
exceptional
over the top
untypical
irregular
ill-judged
fat-headed
phenomenal
illusive
hallucinatory
dead from the neck up
baffling
unaccountable
O.T.T.
a bit much
OTT
regardless
unmindful
creepy
disquieting
spooky
novel
out of place
droll
excessive
touched
outre
out of the way
left-field
remiss
neglectful
stunning
notable
striking
momentous
prodigious
miraculous
out of sight
delusive
unforgettable
eye-catching
arresting
inattentive
irreflective
special
noteworthy
conspicuous
disconsonant
inapropos
disparate
deranged
deceiving
quixotic
undiscerning
unreflective
precipitate
unheeding
exceeding
extraordinaire
unprecedented
serious
preternatural
tremendous
wondrous
crazed
deluding
amazeballs
taking the cake
beguiling
heavy
flash
forby
mental
fictitious
absent-minded
listless
weird and wonderful
off beaten path
never to be forgotten
unachievable
maniacal
disturbed
psycho
fraudulent
loco
whacko
gaga
unobtainable
unworldly
haywire
hopeless
unviable
way off
bats
nutsy
forlorn
undoable
insurmountable
distracted
gone
berserk
seat-of-the-pants
psychopathic
unrealizable
insuperable
irresoluble
insolvable
unsolvable
disordered
starry-eyed
paradoxical
irresolvable
doolally
unglued
flipped
schizo
gratuitous
impervious
insoluble
inaccessible
useless
inexecutable
impassable
irrealizable
round the bend
not sensible
unprovoked
up the pole
off the air
not applicable
blue sky
not on
not possible
no-way
not a prayer
not worth considering
beyond one
no-go
like herding cats
beyond you
off your trolley
off your chump
off the rails
idle
bottomless
causeless
chimerical
uncalled for
uncalled-for
without reason
without cause
not backed up
off-center
in left field
out in left field
more ❯
Adjective
▲
Not economically viable or feasible
economically unsound
disadvantageous
impractical
nonviable
unprofitable
non-feasible
economically nonviable
economically unfeasible
financially unviable
economically dubious
economically unsustainable
economically unworkable
financially shaky
Adjective
▲
Lacking in accuracy or truth
invalid
incorrect
wrong
inaccurate
erroneous
inexact
false
untrue
faulty
out
off
untruthful
unfounded
spurious
bogus
inadequate
baseless
unconvincing
unsubstantiated
untenable
unwarranted
groundless
unjustified
foundationless
nonvalid
unsupported
illegal
mad
reasonless
sophistic
unreasoned
off target
off beam
way out
wide of the mark
full of holes
not working
ill-founded
wrongly inferred
unsound
flawed
fallacious
unreasonable
specious
unreliable
defective
uncorroborated
without foundation
imprecise
weak
mistaken
illogical
unproven
unconfirmed
unjustifiable
misleading
without basis
misguided
unverified
shaky
questionable
imperfect
flimsy
amiss
distorted
ungrounded
iffy
indefensible
in error
irrational
off base
not exact
not accurate
speculative
conjectural
off-base
awry
dodgy
phoney
UK
impaired
gratuitous
unattested
phony
US
counterfactual
askew
way off
trumped-up
trumped up
not backed up by evidence
implausible
unfit
insupportable
sophistical
fallible
blemished
illusory
tenuous
untested
fictitious
fishy
idle
vain
dicey
unacceptable
misinformed
unreal
untrustworthy
wide
imaginary
bottomless
fabricated
abroad
indefinite
falsified
without justification
uncalled-for
off-beam
all wet
way off-beam
inexcusable
absurd
unforgivable
error-filled
fake
unpardonable
unfitting
deceptive
preposterous
improper
delusive
wanting
delusory
deceiving
unwarrantable
senseless
deluding
undefendable
beguiling
factitious
nonsupported
inadmissible
erratic
erring
not trustworthy
unarguable
unsupportable
without substantiation
without merit
fraudulent
not genuine
fluffed
astray
off-target
misfigured
goofed
misconstrued
mishandled
miscalculated
discrepant
adrift
way off beam
not precise
at fault
garbled
unfaithful
careless
wild
out of line
out of commission
on the wrong track
unendorsed
dubious
way-out
not true
way-off
not right
doesn't wash
doubtful
deficient
bad
suspect
unprovoked
unsupervised
hearsay
unofficial
frail
uncertain
empty
incomplete
warped
undependable
debatable
botched
nebulous
cracked
tainted
disputable
causeless
confused
arguable
chimerical
dubitable
injured
unestablished
debased
rank
insufficient
contradictory
leaky
incoherent
lame
controversial
suspicious
malformed
blamable
suppositive
suppositious
uncalled for
presumed
assumed
below par
without reason
without cause
not backed up
not validated
open to question
open to doubt
hard to believe
wrong number
all off
more ❯
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unsustainable
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unsustainably
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Nearby Words
unsustainable fishing
unsustainably
unswallowed
unswappable
unswayable
unswayed
unsuspiciousness
unsuspiciously
unsuspicious
unsuspectingly
unsuspecting
unsuspectedly
13-letter Words Starting With
u
un
uns
unsu
unsus
unsust
unsusta
unsustai
unsustain
unsustaina
unsustainab
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