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What is another word for
unsubstantiated
?
Need
synonyms for unsubstantiated
? Here's a list of
similar words
from our
thesaurus
that you can use instead.
Contexts
▼
▲
Not supported or proven by evidence
Not officially authorized or confirmed
Based on or calculated through theory rather than experience or practice
Subject to one or more conditions or requirements being met
Slanderous or libelous in nature
Supposed, or assumed to be
… more ▼
▲
Adjective
▲
Not supported or proven by evidence
groundless
unfounded
baseless
unreasonable
unsupported
unwarranted
ill-founded
speculative
spurious
untested
unverified
conjectural
questionable
unattested
unconfirmed
uncorroborated
unestablished
unjustifiable
unjustified
unproven
assumed
not validated
presumed
unreliable
untrustworthy
debatable
disputable
dodgy
doubtful
dubious
flimsy
foundationless
iffy
invalid
nebulous
nonvalid
suspect
tenuous
undependable
unsound
weak
without basis
without foundation
arguable
controversial
dubitable
fishy
indefinite
open to question
suppositious
suppositive
suspicious
uncertain
not backed up by evidence
hard to believe
open to doubt
false
specious
shaky
untrue
erroneous
illogical
fallacious
unconvincing
untenable
inaccurate
wrong
fabricated
ungrounded
flawed
misguided
defective
implausible
vain
irrational
fallible
faulty
misinformed
deceptive
incorrect
trumped-up
idle
fake
gratuitous
bottomless
equivocal
bogus
unendorsed
trumped up
mistaken
nonrational
illegitimate
unreasoning
inconsequent
inconsequential
reasonless
sophistic
unreasoned
problematic
fictitious
unauthenticated
made-up
imaginary
full of holes
wide of the mark
invented
indefensible
preposterous
uncalled-for
vague
empty
inadequate
misleading
illusory
sketchy
absurd
untruthful
dicey
without justification
hollow
unsustainable
inexact
chancy
rocky
disreputable
risky
phoney
UK
incongruous
unreal
falsified
phony
US
doubtable
off
unsubstantial
mad
flakey
US
pseudo
unstable
flaky
UK
sham
problematical
shady
queer
off beam
off-target
unclear
insecure
nonsupported
unproved
manufactured
inexcusable
unpardonable
unwarrantable
unforgivable
unsafe
without substantiation
without merit
factitious
faked
contrived
mendacious
off-base
mythical
legendary
unsupervised
hearsay
unofficial
controvertible
inexpiable
delusory
delusive
insubstantial
uncanonical
contentious
borderline
not genuine
imprecise
unbacked
casuistic
moot
issuable
insupportable
negligible
fragile
distorted
in doubt
negotiable
beguiling
deceitful
deluding
deceiving
unspecific
insignificant
hazy
unprovoked
allonymous
ungenuine
counterfeit
fictional
improbable
unpersuasive
unbelievable
cooked up
made up
sophistical
unsettled
unsure
indecisive
open to debate
open to suspicion
subject to debate
fraudulent
indeterminate
nonsensical
poor
unsatisfactory
unlikely
far-fetched
contradictory
incredible
ludicrous
inconclusive
feeble
farfetched
lame
unauthorized
US
not reliable
not dependable
way off beam
way off
apocryphal
unsupportable
inconceivable
obscure
impossible
irreconcilable
puzzling
senseless
fantastic
chimerical
pathetic
airy
fatuous
nutty
thin
wacky
slight
reachy
unimpressive
uncalled for
not backed up
causeless
unscientific
without cause
unauthorised
UK
without reason
out
inconsistent
off the wall
won't hold water
won't wash
self-contradictory
without explanation
off target
wrongly inferred
illegal
way out
not working
paltry
ridiculous
shallow
trifling
silly
insufficient
unimaginable
unthinkable
stupid
incoherent
half-baked
ineffectual
idiotic
hard to swallow
fantastical
incredulous
uncompelling
daft
unconceivable
transparent
remote
frail
foolish
crazy
trivial
fanciful
inane
brainless
insane
imbecilic
beyond belief
ill-considered
ill-defined
kooky
full of it
frivolous
slim
harebrained
superficial
flat
unintelligent
imperfect
arbitrary
witless
unwise
indistinct
injudicious
light
moronic
confused
asinine
loony
cock-and-bull
too much
cockamamie
scarcely credible
for the birds
tame
ineffective
difficult to believe
faint
inept
unsuccessful
outside
small
distant
unacceptable
puerile
futile
bad
vapid
wishful
unrealistic
disjointed
slender
minute
amiss
contemptible
assailable
weakly
meaningless
mindless
laboured
UK
impaired
ambiguous
faltering
strained
forced
dotty
laughable
thoughtless
incomprehensible
imprudent
staggering
perverse
mind-boggling
barmy
not likely
vacant
indiscreet
zany
incautious
labored
US
unimagined
strange
unintelligible
far out
extraordinary
dim
cockeyed
screwy
perplexing
incogitable
mind-blowing
rare
hesitant
shadowy
lunatic
dippy
daffy
jerky
short-sighted
ill-advised
half-witted
nerdy
doltish
unearthly
softheaded
beyond the bounds of possibility
feebleminded
tomfool
simple
threadbare
unarguable
undefendable
refutable
tiny
inauthentic
inadmissible
minimal
meagre
UK
meager
US
tall
unplausible
wrongly deduced
minuscule
exiguous
weak-kneed
lacking substance
puny
unthinking
useless
fruitless
profitless
ponderous
feeble-minded
astonishing
amazing
wild
irrelevant
unconnected
outlandish
cock and bull
enigmatic
blurred
reaching
infeasible
unapt
inefficient
flabby
unpleasing
unsuitable
eye-popping
scatterbrained
lamebrained
past belief
jaw-dropping
demented
off-the-wall
freaky
distraught
raving
aberrant
disconnected
delirious
not following
hard to take
not convincing
slim and none
not expected
outside chance
unheard of
impracticable
hundred-to-one
not making sense
woolly
UK
bleary
foggy
cloudy
purposeless
unheard-of
unknowable
wooly
US
fuzzy
erratic
loose
capricious
bad-tempered
stroppy
quirky
out of the question
imcomprehensible
insupposable
ill-tempered
hesitating
halting
vacuous
extremely implausible
extremely unlikely
extremely doubtful
worthless
loopy
cockamamy
not to be thought of
beyond reason
won't fly
extremely difficult to believe
not in the least likely
all wet
cretinous
pointless
risible
stuttering
stammering
inarticulate
casual
minor
petty
unimportant
shoestring
inconsiderable
full of hot air
empty-headed
goofy
gormless
infantile
dumb
damfool
divvy
childish
insincere
dof
glaikit
insipid
crass
wishy-washy
immature
innocuous
sappy
hypocritical
artificial
cynical
garbled
stumbling
devoid of intelligence
feigned
pretended
inexplicit
debased
rank
unretentive
unfit
adulterated
awry
lemon
sick
malformed
injured
tainted
blamable
broken-down
warped
marred
botched
blemished
incomplete
cracked
leaky
deficient
maimed
pretend
dissimulating
dissembling
unpredictable
unforeseeable
indistinguishable
unresolved
incalculable
cryptic
arcane
abstruse
undetermined
undefined
mysterious
mumbled
muttered
broken
poorly spoken
treacherous
undecided
unknown
confusing
muffled
double-dealing
devoid of validity
two-faced
hollow-hearted
faithless
intangible
indiscernible
wavering
irresolute
equivocating
elusive
vacillating
below par
up in the air
in the balance
more ❯
“This has led to all sorts of unfair and
unsubstantiated
accusations being leveled against me.”
Adjective
▲
Not officially authorized or confirmed
unofficial
unconfirmed
uncorroborated
unauthorised
UK
unauthorized
US
undocumented
private
unauthenticated
unratified
unsanctioned
personal
uncertified
off-the-record
unendorsed
off the record
hearsay
unsupported
unsupervised
invalid
unverified
unproven
unfounded
groundless
baseless
foundationless
untested
without foundation
without basis
unreasonable
unwarranted
nonvalid
unjustifiable
spurious
unjustified
conjectural
ill-founded
speculative
questionable
unreliable
unsound
unattested
untenable
weak
not backed up by evidence
false
specious
misguided
misinformed
ungrounded
trumped-up
untried
unproved
fabricated
idle
vain
untrue
erroneous
fallacious
flawed
defective
shaky
flimsy
tenuous
gratuitous
bottomless
trumped up
dubious
illogical
nonsupported
reasonless
without substantiation
without merit
inaccurate
empty
experimental
undemonstrated
unapproved
indefensible
unwarrantable
inexcusable
unforgivable
unpardonable
new
without justification
implausible
inexpiable
uncalled-for
untruthful
mendacious
unreal
off-base
misleading
deceptive
insupportable
unestablished
assumed
untrustworthy
presumed
not validated
disputable
dodgy
suspect
iffy
debatable
nebulous
doubtful
undependable
uncertain
controversial
arguable
suppositious
suppositive
suspicious
dubitable
indefinite
open to question
fishy
open to doubt
hard to believe
more ❯
Adjective
▲
Based on or calculated through theory rather than experience or practice
theoretical
academic
hypothetical
conjectural
speculative
suppositional
notional
assumed
postulatory
presumed
unproven
academical
conjectured
ideational
imagined
suppositious
untested
nominal
suppositive
analytical
codified
contingent
formalistic
formularized
general
idealised
UK
idealized
US
ideological
imaginary
imaginative
impractical
instanced
intellectual
logical
pedantic
philosophical
postulated
problematical
quixotic
tentative
theoretic
transcendent
transcendental
unearthly
unproved
vague
in theory
on paper
as a premise
in the abstract
abstract
ideal
putative
metaphysical
supposed
unfounded
groundless
based on guesswork
hypothetic
pure
conceptual
unreal
fanciful
experimental
hairy
dangerous
projected
conceptive
illusory
fancied
imagal
visionary
inferred
presupposed
suspected
surmised
postulational
uncertain
guessing
unresolved
figured
surmising
reputed
doubtful
suspect
guesstimated
on a hunch
on a long shot
alleged
apparent
supposititious
purported
presumptive
likely
asserted
inferential
seeming
ostensible
ostensive
evident
rumoured
UK
rumored
US
prima facie
accepted
held
thought
unconfirmed
unrealistic
reported
believed
indefinite
said
claimed
understood
intelle
divinatory
paradigmatic
recognized
US
acknowledged
considered
regarded
non-practical
professed
recondite
deemed
estimated
unpractical
nonconcrete
imputed
reputative
non-technical
blue-sky
intangible
immaterial
unpragmatic
specious
irrelevant
accounted
fundamental
basic
higher
commonly believed
commonly regarded
soi-disant
recognised
UK
declared
useless
reckoned
judged
invented
made-up
fictional
fabled
gossiped
suppository
ivory-tower
indeterminate
casual
contestable
disputable
equivocal
assumptive
stochastic
concocted
questionable
conditional
conjecturable
debatable
refutable
provisory
proposed
guessed
pretending
problematic
ivory-towered
ivory-towerish
made up
expected
hypothesized
US
granted
anticipated
implicit
given
connoted
tacit
hypothesised
UK
counted on
taken as known
taken for granted
more ❯
Adjective
▲
Subject to one or more conditions or requirements being met
tentative
indefinite
provisional
unconfirmed
trial
unsettled
experimental
preliminary
speculative
test
conjectural
exploratory
pilot
TBC
conditional
dependent
provisionary
provisory
unproven
untried
pencilled in
acting
contingent
makeshift
probationary
rough
subject to
temporary
undecided
subject to confirmation
ad interim
contingent on
contingent upon
not final
not settled
on trial
to be confirmed
open for consideration
open to consideration
subject to change
untested
new
unattempted
unproved
prototype
unestablished
novel
unessayed
inexperienced
fledgling
unfledged
in the experimental stage
immature
green
fresh
unexpert
callow
developmental
sample
investigative
fact-finding
probing
explorative
based on
resting on
hanging on
hingeing on
depending on
determined by
controlled by
model
practice
approximate
initial
testing
mock
interim
caretaker
stopgap
pretend
simulated
searching
transitional
changeover
analytic
improvised
working
investigational
qualified
unfinished
limited
confirmation
elimination
corroboration
interregnal
draft
US
outline
draught
UK
fill-in
empirical
examining
make-do
hypothetical
pro tem
pro tempore
rough-and-ready
based
preparatory
under review
beginning
unconcluded
depending
counting
relying
susceptible to
related to
relying on
liable to
under control of
relative to
incidental to
conditional on
swayed by
resultant from
regulated by
bound by
accessory to
influenced by
first stage
dependent on
on the drawing board
tied to
bound up with
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
unwarranted
damaging
insupportable
unsupported
untrue
lying
malicious
misrepresentative
scandalous
unjustifiable
unjustified
ill-founded
mud-slinging
vilifying
disparaging
derogatory
denigratory
vituperative
insulting
invidious
backbiting
contumelious
traducing
debasing
abusive
slurring
smearing
muckraking
sarcastic
poisonous
dirty
vicious
more ❯
Adjective
▲
Supposed, or assumed to be
purported
ostensible
supposed
alleged
professed
claimed
maintained
unsupported
so-called
feigned
pretended
seeming
assumed
apparent
avowed
ostensive
presumed
outward
specious
superficial
surface
putative
reputed
evident
declared
illusory
quasi-
semblant
prima facie
fake
bogus
false
sham
phoney
UK
spurious
mock
artificial
simulated
counterfeit
pretend
perceived
imitation
fraudulent
forged
illusive
likely
plausible
phony
US
put-on
appearing
pseudo-
possible
exterior
to all appearances
probable
suppositious
ersatz
synthetic
nominal
cod
virtual
deceptive
semi-
fakey
near
reported
would-be
exhibited
manifest
colorable
notable
demonstrative
quasi
pseudo
affected
contrived
faked
insincere
make-believe
imaginary
factitious
hypocritical
mechanical
plastic
strained
unnatural
forced
fictitious
masked
lying
impostrous
bluffing
shammed
in name only
quack
charlatan
falsified
cheating
covered
concealed
dissimulated
imposturous
more ❯
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unsubstantiatedly
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Nearby Words
unsubstantiated information
unsubstantiatedly
unsubtle
unsubtly
unsuccess
unsuccesses
unsubstantially
unsubstantiality
unsubstantialities
unsubstantial
unsubscribing
unsubscribes
15-letter Words Starting With
u
un
uns
unsu
unsub
unsubs
unsubst
unsubsta
unsubstan
unsubstant
unsubstanti
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