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

Just the mixture between protective strength and unbelievable vulnerability. — Jackie Strause, HollywoodReporter, 23 Sep. 2026

That second half is unbelievable to find a way to come out with a win. — Alex Kushel, Sun Sentinel, 18 Sep. 2026

Netflix documentary The Lost Children tells the almost unbelievable tale of four children stranded after a plane crash in the jungles of Colombia. — K. Thor Jensen, PC Magazine, 18 Sep. 2026

If college is defined by unbelievable disasters that become lifelong stories, then this singular tale of friendship is forged in the aftermath of connecting through a very public mistake. — Alison Foreman, IndieWire, 17 Sep. 2026