Synonyms of unbelievable

unbelievable

adjective

ˌən-bə-ˈlē-və-bəl 

as in incredible

too extraordinary or improbable to believe

a completely unbelievable story about why there was lipstick on his collar

Synonyms & Similar Words

• incredible
• incredulous
• impossible
• unlikely
• unimaginable
• inconceivable
• ridiculous
• unthinkable
• implausible
• absurd
• unreasonable
• fantastic
• questionable
• unconvincing
• doubtful
• unconceivable
• silly
• full of it
• dubious
• uncompelling
• debatable
• suspicious
• shaky
• hopeless
• fishy
• suspect
• disputable
• ludicrous
• flimsy
• laughable
• comical
• far-fetched
• outlandish
• farcical
• untenable
• preposterous
• indefensible
• dubitable
• dodgy
• doubtable
• risible
• insupportable

Antonyms & Near Antonyms

• plausible
• believable
• conceivable
• possible
• imaginable
• convincing
• credible
• creditable
• probable
• thinkable
• likely
• reasonable
• supposable
• cogitable
• undeniable
• unquestionable
• indisputable
• certain
• sure
• incontestable
• undoubted
• indubitable
• questionless

Example Sentences

Recent Examples of unbelievable

Having the two scrimmages and playing pretty well there, and then the opening game with (Habersham Central), the environment was unbelievable here at Herndon Stadium. — Jack Leo, AJC.com, 1 Sep. 2026

What an unbelievable joy to have shared a sound stage with him and to engage with such a master talent. — Selome Hailu, Variety, 26 Aug. 2026

Emilio Pagán shut the door, and boos filled Oracle Park as the Reds celebrated their unbelievable victory. — Justice Delos Santos, Mercury News, 26 Aug. 2026

Then, just when the family started to get ready to leave, something unbelievable happened. — Georgia Slater, PEOPLE, 26 Aug. 2026