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What is another word for
ill-founded
?
Need
synonyms for ill-founded
? Here's a list of
similar words
from our
thesaurus
that you can use instead.
Contexts
Not based on fact or reliable evidence
Based on a mistaken belief
Slanderous or libelous in nature
Adjective
▲
Not based on fact or reliable evidence
groundless
unsubstantiated
unproven
baseless
unfounded
unsupported
conjectural
foundationless
questionable
unconfirmed
unjustified
unverified
dubious
speculative
unauthenticated
uncorroborated
ungrounded
unsound
empty
false
illogical
inaccurate
misguided
misinformed
spurious
unreliable
trumped-up
without basis
without foundation
not backed up by evidence
unreasonable
invalid
flimsy
unwarranted
specious
weak
nonvalid
fallacious
erroneous
unjustifiable
irrational
faulty
tenuous
untenable
flawed
shaky
implausible
defective
gratuitous
unattested
untrue
unsustainable
indefensible
absurd
vain
idle
uncalled-for
preposterous
untested
bottomless
senseless
unacceptable
suspect
wrong
dodgy
iffy
unconvincing
fabricated
untruthful
reasonless
unbacked
unsubstantial
full of holes
sophistic
trumped up
without substantiation
without merit
unreal
off-base
misleading
incorrect
incongruous
nonrational
hollow
fallible
casuistic
inconsequent
illegitimate
inconsequential
unreasoning
inexact
insupportable
out
unarguable
undefendable
refutable
off
doubtful
unprovoked
inadmissible
inadequate
bogus
mad
wide of the mark
unreasoned
off target
off beam
wrongly inferred
illegal
not working
way out
uncertain
unauthorized
US
undependable
debatable
fishy
nebulous
disputable
arguable
untrustworthy
dubitable
unestablished
chimerical
illusory
imaginary
controversial
suspicious
suppositious
suppositive
assumed
presumed
not backed up
uncalled for
causeless
open to doubt
hard to believe
indefinite
open to question
not validated
frivolous
controvertible
inconceivable
incredible
without justification
without cause
unauthorised
UK
without reason
superficial
unbelievable
without explanation
inane
lacking substance
unpersuasive
assailable
wishful
weakly
contemptible
feeble
foolish
silly
nonsensical
stupid
unwise
injudicious
ludicrous
idiotic
mindless
thoughtless
imprudent
ridiculous
ill-considered
unintelligent
rash
ill-advised
crazy
brainless
contradictory
incoherent
nutty
indiscreet
unthinking
wacky
poor
short-sighted
fanciful
lame
witless
unsatisfactory
meaningless
unrealistic
reckless
vague
inconsistent
far-fetched
imprecise
unscientific
improbable
inadvisable
impolitic
mistaken
fantastic
pathetic
unlikely
confused
thin
risky
off the wall
inappropriate
irresponsible
pointless
insane
daft
naive
improvident
wild
distorted
inconclusive
imbecilic
half-baked
impractical
equivocal
imperfect
trifling
crackbrained
scatterbrained
kooky
doubtable
flakey
US
unstable
flaky
UK
fatuous
unclear
inept
foolhardy
unsettled
problematic
fantastical
impaired
asinine
bad
amiss
moot
ill-judged
incredulous
uncompelling
futile
deficient
hasty
heedless
not making sense
fruitless
incomplete
simpleminded
shallow
incautious
immature
loony
hard to swallow
impossible
laughable
chancy
rocky
disreputable
barmy
irreconcilable
insignificant
obscure
arbitrary
trivial
paltry
deceptive
misconceived
unimportant
ambiguous
indecisive
demented
insubstantial
irrelevant
unproved
puzzling
clueless
moronic
shady
farfetched
self-contradictory
careless
pseudo
sham
unconnected
problematical
errant
erring
unimpressive
unsure
ineffectual
queer
sketchy
damfool
aberrant
off-target
off-the-wall
beyond belief
insufficient
transparent
giddy
flighty
contentious
unfit
frail
broken-down
botched
ill-conceived
issuable
tainted
warped
marred
blemished
ill-thought-out
childish
negotiable
impulsive
below par
undesirable
unfortunate
harebrained
featherbrained
lamebrained
scarcely credible
unconsidered
idiotical
negligent
lamebrain
hare-brained
open to debate
birdbrained
dim-witted
half-witted
not convincing
insecure
dicey
discrepant
unsafe
unsupportable
airy
reachy
slight
vacuous
all wet
wrongly deduced
won't hold water
won't wash
rambling
wandering
phony
US
borderline
inexpedient
unassured
not well thought out
falsified
fake
tame
phoney
UK
unplausible
undiplomatic
brash
indelicate
graceless
tactless
wrong-headed
subject to debate
open to suspicion
in doubt
misplaced
cock and bull
not likely
cockamamie
inferior
unintelligible
lightweight
stray
straying
overhasty
slipshod
shabby
unthinkable
unimaginable
unconceivable
strained
not reliable
not dependable
murky
enigmatic
freaky
without substance
idealistic
unfocused
incorporeal
remote
labored
US
laboured
UK
forced
ponderous
messed up
shoddy
distraught
raving
counterintuitive
disconnected
delirious
disjointed
off course
contestable
strange
bewildering
indistinct
muddled
disputed
contended
worthless
hazy
useless
airy-fairy
mootable
casual
minor
petty
minute
negligible
light
small
shoestring
inconsiderable
tearaway
difficult to believe
cock-and-bull
hard to take
full of it
valueless
open to discussion
indeterminate
feather-brained
purposeless
ill-defined
unproductive
undetermined
open
unavailing
deluded
impracticable
unprofitable
aimless
undecided
unresolved
unworkable
extravagant
crackpot
purportless
unsatisfying
resolving nothing
unfinished
unfateful
uneventful
proving nothing
lacking
needless
hopeless
dumb
footling
wasted
leaving matters open
unmeaning
to no purpose
in vain
without rhyme or reason
debased
rank
unretentive
adulterated
awry
lemon
sick
malformed
injured
blamable
cracked
leaky
maimed
up in the air
still open to question
left hanging
not yet established
still open to doubt
sophistical
faltering
cock-eyed
perverse
cockeyed
screwy
not following
beyond the bounds of possibility
more ❯
“Some true believers on one side have been unable to free themselves from a sense of blind loyalty to the past,
ill-founded
as it is in whole or in part.”
Adjective
▲
Based on a mistaken belief
fallacious
false
misleading
deceptive
erroneous
incorrect
mistaken
untrue
wrong
delusive
delusory
fictitious
illusory
spurious
sophistic
specious
faulty
flawed
imprecise
inaccurate
inexact
misinformed
misguided
unfounded
baseless
distorted
fabricated
foundationless
groundless
unproven
unsubstantiated
beguiling
bogus
deceitful
deceiving
deluding
dicey
iffy
illogical
phoney
UK
uncorroborated
unsupported
dodgy
made up
sophistical
trumped up
fishy
fraudulent
mad
off
phony
US
reasonless
ungrounded
unreal
unreasoned
without basis
without foundation
full of holes
off beam
way off
way off beam
unsound
invalid
untruthful
unreliable
imaginary
fake
sham
out
chimerical
defective
in error
invented
wide of the mark
fanciful
counterfactual
fantastic
ostensible
apparent
illusive
fictional
off target
pseudo
seeming
unreasonable
concocted
visionary
ideal
chimeric
flimsy
hallucinatory
amiss
weak
questionable
mock
fictive
imperfect
imagined
counterfeit
casuistic
insincere
dishonest
hollow
phantasmal
misrepresentative
dreamlike
unwarranted
unjustified
whimsical
awry
truthless
implausible
off-beam
off-target
tenuous
suppositious
vain
mythical
fabulous
semblant
falsified
phantasmagoric
blue-sky
trumped-up
artificial
forged
not exact
off base
abroad
not accurate
factitious
fantastical
off-base
apocryphal
notional
pretend
improper
phantasmic
impaired
idle
fallible
unjustifiable
nonvalid
askew
gratuitous
economical with the truth
way out
feigned
make-believe
simulated
ambiguous
contrived
faked
empty
ersatz
doubtful
fancied
bad
illusionary
dubious
meretricious
coloured
UK
colored
US
unconvincing
astray
adrift
lying
mythic
unconfirmed
unfit
phantasmagorical
garbled
unverified
speculative
conjectural
phantom
cooked-up
shaky
blemished
discrepant
erring
confused
fantasied
untrustworthy
imaginal
untested
way-out
way-off
unattested
mythological
irrational
assailable
not true
wide
uncalled-for
bottomless
all wet
untenable
off the mark
way off-beam
made-up
not backed up by evidence
deluded
surreal
nightmarish
psychedelic
dissembling
misconceived
phantasmagorial
kaleidoscopic
Kafkaesque
phantasmagorian
bizarre
fakey
impostrous
insubstantial
quixotic
mendacious
unfitting
indefinite
unprovoked
plausible
terminologically inexact
contrary to fact
glib
wrong-headed
unfactual
nonfactual
wanting
unsustainable
unfaithful
careless
wild
ostentatious
pretentious
likely
captious
colorable
presumable
credible
probable
sophisticated
flattering
presumptive
nugatory
unauthorized
US
indefensible
not trustworthy
pretended
imitation
not the case
cheating
cunning
devious
faithless
pretending
erratic
tricky
error-filled
seemingly correct
disingenuous
without substantiation
without merit
not right
fluffed
undependable
suspect
insupportable
dummy
confusing
phantasm
misfigured
goofed
misconstrued
mishandled
miscalculated
uncalled for
not backed up
causeless
evasive
plausible but wrong
apparently right
inappropriate
chancy
risky
rocky
disreputable
unarguable
undefendable
refutable
unauthentic
inauthentic
doesn't wash
casuistical
substitute
without justification
without reason
without cause
unauthorised
UK
manufactured
unstraightforward
uncertain
cod
not precise
not working
at fault
inadmissible
equivocal
queer
bewildering
distracting
perplexing
mistakable
demagogic
catchy
confounding
puzzling
without explanation
snide
out of commission
out of line
pirate
wrong number
all off
absurd
on the wrong track
wrongly identified
off track
labouring under a misapprehension
in the wrong
wide of mark
barking up wrong tree
barking up the wrong tree
ungenuine
adulterine
flakey
US
unstable
open to question
flaky
UK
open to doubt
unacceptable
senseless
preposterous
inconceivable
incredible
frivolous
controvertible
not genuine
superficial
unbelievable
improbable
unlikely
unbacked
inane
wishful
feeble
haywire
unsatisfactory
foul
unpersuasive
unsubstantial
contemptible
weakly
unapt
rotten
supposititious
debased
rank
unretentive
contradictory
adulterated
lemon
sick
frail
malformed
injured
tainted
blamable
broken-down
warped
lame
marred
botched
inadequate
incomplete
insufficient
cracked
leaky
deficient
maimed
incoherent
delusional
crooked
far-fetched
Barmecidal
Barmecide
out of order
non-existent
glitched up
lacking substance
below par
blue sky
pipe dream
romantic
ethereal
nonexistent
imaginative
legendary
hypothetical
immaterial
figmental
abstract
impalpable
dreamy
shadowy
fantasy
intangible
fairy-tale
storybook
theoretical
utopian
airy
unrealistic
weird
incorporeal
spectral
otherworldly
aerial
spiritual
ghostly
dreamed-up
ridiculous
ghostlike
vague
indistinct
assumed
unclear
impractical
nebulous
extravagant
impracticable
quixotical
imagal
idealized
US
starry
bodiless
out of this world
devised
capricious
curious
ambitious
allegorical
conceptual
unbodied
idealised
UK
formless
starry-eyed
nonmaterial
metaphysical
nonphysical
discarnate
oneiric
traditional
created
idealistic
supernatural
unearthly
wraithlike
unworkable
faint
fabled
disembodied
hazy
unfeasible
supposed
obscure
extraordinary
invisible
dim
misty
wonderful
faux
virtual
hopeful
eccentric
idealist
apparitional
ideological
synthetic
poetic
product of someone's imagination
all in one's head
hyped up
strange
offbeat
crackpot
thought up
out of touch with reality
epic
hoax
filled with dreams
folkloric
mythologic
storied
trick
non-physical
non-material
unembodied
unread
mocking
wistful
dream
chimeral
transcendental
unworldly
reproduction
reachy
replica
unnatural
created out of thin air
subjective
disincarnate
improvised
larger-than-life
in your head
lofty
dream-filled
conceived
uncorporeal
ideational
suppositional
putative
unprovable
dreamt up
conjectured
theoretic
unverifiable
unhistoric
unhistorical
dreamish
trancelike
spooky
tall
superstitious
freety
apprehensive
fearful
daydreaming
hypnagogic
trance-like
vaporous
far out
fairy tale
kinky
floating
uncanny
head-in-the-clouds
eerie
ivory-towered
with your head in the clouds
in the clouds
indefinable
odd
nonsensical
cock and bull
hard to swallow
hard to take
insane
pie in the sky
castles in the air
on cloud nine
ghastly
expressive
untouchable
ludicrous
crazy
impossible
creative
indescribable
unthinkable
peculiar
haunted
imponderable
outlandish
left-field
wondrous
shadowlike
ephemeral
inexistent
perfectionist
fresh
exotic
original
other-worldly
unimaginable
foolish
comical
incredulous
grandiose
oddball
imperceptible to the touch
inspired
artistic
inventive
fancy
quirky
originative
flighty
unconceivable
wacky
amazing
uncompelling
zany
enigmatic
astounding
artful
brilliant
unconventional
freaky
radical
fertile
freakish
ingenious
genius
experimental
innovative
keen
naive
cockamamie
barmy
different
potty
daft
singular
extreme
innovational
unorthodox
vivid
revolutionary
astute
outré
indistinguishable
sensational
astonishing
awesome
spectacular
incomprehensible
stupendous
out there
breathtaking
romanesque
glamourous
glamorous
out of sight
off-the-wall
cock-and-bull
off the wall
hare-brained
cock-eyed
blurry
undefined
far-out
head in the clouds
avant-garde
Promethean
pie-in-the-sky
blurred
fuzzy
murky
unrecognizable
US
indeterminate
bleary
gauzy
foggy
opaque
weird and wonderful
deviating
marvellous
UK
marvelous
US
surprising
nebulose
undetermined
pale
blear
unrecognisable
UK
cloudy
lacking definition
out of focus
ill-defined
fool's paradise
figment of imagination
more ❯
Adjective
▲
Slanderous or libelous in nature
scurrilous
defamatory
slanderous
aspersory
libellous
UK
libelous
US
maligning
pejorative
aspersive
baseless
calumniatory
calumnious
false
injurious
opprobrious
uncorroborated
unfounded
unsubstantiated
unwarranted
damaging
insupportable
unsupported
untrue
lying
malicious
misrepresentative
scandalous
unjustifiable
unjustified
mud-slinging
vilifying
disparaging
derogatory
denigratory
vituperative
insulting
invidious
backbiting
contumelious
traducing
debasing
abusive
slurring
smearing
muckraking
sarcastic
poisonous
dirty
vicious
more ❯
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ill-founded
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Nearby Words
ill-furnished
ill-gotten
ill-gotten gains
ill-groomed
I'll have one
ill health
ill-fortunes
ill-fortune
ill fortune
ill-formed
ill-fitting
ill-fitted
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