English Thesaurus

Synonyms of 'false'

(adjective) 
Definition
not in accordance with the truth or facts
This resulted in false information being entered.
Synonyms
incorrect
He denied that his evidence was incorrect.
,
wrong
That was the wrong answer – try again.
,
mistaken
She obviously had a mistaken view.
,
misleading
The article contains several misleading statements.
,
faulty
Their interpretation was faulty.
,
inaccurate
The reports were based on inaccurate information.
,
invalid
Those arguments are rendered invalid by the hard facts.
,
improper
The improper use of medicine can lead to severe adverse reactions.
,
unfounded
The allegations were totally unfounded.
,
erroneous
The conclusions they have come to are completely erroneous.
,
inexact
Forecasting was an inexact science.
Opposites
(adjective) 
Definition
misleading or deceptive
You do not know whether what you are told is true or false.
Synonyms
untrue
The allegations were completely untrue.
,
fraudulent
fraudulent claims about being a nurse
, ,
concocted
,
fictitious
a source of fictitious rumours
,
trumped up
He was put on trial facing trumped up spy charges.
,
fallacious
Their argument is fallacious.
,
untruthful
Some people may be tempted to give untruthful answers.
,
Opposites
(adjective) 
Definition
not real or genuine but intended to seem so
He paid for a false passport.
Synonyms
artificial
The sauce was glutinous and tasted artificial.
,
forged
She was carrying a forged American passport.
,
fake
The bank manager is said to have issued fake certificates.
,
mock
`It's tragic,' he swooned in mock horror.
, ,
synthetic
synthetic rubber
, ,
imitation
a set of novels bound in imitation leather
,
bogus
bogus insurance claims
,
simulated
a necklace of simulated pearls
,
sham
The election has been denounced as a sham by world leaders.
,
pseudo (informal)
,
counterfeit
He admitted possessing and delivering counterfeit currency.
,
feigned
He answered me with feigned indifference.
,
spurious
a spurious framework for analysis
,
ersatz
an electric fire with ersatz logs
,
pretended
Todd shrugged with pretended indifference.
Opposites
, , , , , ,
kosher (informal)
,
dinkum (Australian, New Zealand, informal)
(adjective) 
She was a false friend, envious of her lifestyle and her life with her husband.
Synonyms
treacherous
The President spoke of the treacherous intentions of the enemy.
,
lying
that lying hound
,
deceiving
,
unreliable
The figures were unreliable because the sample sizes were too small.
,
two-timing (informal)
,
dishonest
He had become rich by dishonest means.
,
deceptive
Her worst fault is a strongly deceptive streak.
,
hypocritical
It seems hypocritical to pay someone to do the dirty work for me.
,
unfaithful
They denounced him as unfaithful to the traditions of the Society.
,
two-faced
He had been devious and two-faced.
,
disloyal
He proved to be an untrustworthy and disloyal ally.
,
unsound
The thinking is muddled and fundamentally unsound.
,
deceitful
The ambassador called the report deceitful and misleading.
,
faithless
She decided to divorce her increasingly faithless and unreliable husband.
,
untrustworthy
His opponents still say he's a fundamentally untrustworthy figure.
,
insincere
He found himself surrounded by insincere flattery.
,
double-dealing
Slimy, double-dealing politicians have betrayed us all.
, ,
duplicitous
,
mendacious
politicians issuing mendacious claims and counter-claims
,
perfidious (literary)
She says that politicians are a perfidious breed.
,
treasonable
They were brought to trial for treasonable conspiracy.
,
traitorous
the betrayal of men by their most traitorous companions
, , ,
false-hearted
Opposites

Additional synonyms

in the sense of bogus
Definition
not genuine
bogus insurance claims
Synonyms
pseudo (informal),
phoney or phony (informal),
in the sense of counterfeit
Definition
pretended
He admitted possessing and delivering counterfeit currency.
Synonyms
copied,
phoney or phony (informal),
pseud or pseudo (informal)
in the sense of deceitful
Definition
full of deceit
The ambassador called the report deceitful and misleading.

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Video: pronunciation of 'false'

Source

Thesaurus for false from the Collins English Thesaurus
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