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

Hill poured the putt in with ease and felt the embrace as the GB&I team completed a shocking, unbelievable comeback to win the Walker Cup. — Hugh Kellenberger, New York Times, 6 Sep. 2026

The Michigan Wolverines were beaten – and some would say literally – by Western Michigan on Saturday before one of the more unbelievable scenes in the sport's history unfolded. — Mark Harris Outkick, FOXNews.com, 6 Sep. 2026

That's the unbelievable streak that shocked grandparents in Folsom, California, where a trio of twin pregnancy announcements drew a reaction that went viral. — Kelsey Monstrola, USA Today, 1 Sep. 2026

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