Synonyms of improbable

improbable

adjective

(ˌ)im-ˈprä-bə-bəl 

as in unlikely

not likely to be true or to occur

it seems improbable that the two writers never met since they traveled in the same social circles

Synonyms & Similar Words

• unlikely
• doubtful
• questionable
• dubious
• odd
• impossible
• far-fetched
• flimsy
• bizarre
• implausible
• incredible
• inconceivable
• unapt
• unbelievable
• fantastical
• unthinkable
• unimaginable
• ridiculous
• absurd
• fantastic
• outlandish
• foolish
• nonsensical
• preposterous
• unreal
• insane
• crazy
• wild
• remote
• slight
• outside

Antonyms & Near Antonyms

• probable
• likely
• plausible
• possible
• conceivable
• potential
• credible
• earthly
• believable
• imaginable
• liable

Example Sentences

Recent Examples of improbable

The fact that Rick Pitino, essentially blacklisted from college coaching at the age of 65, is now, at 72 years old, taking a 30-4 team ranked No. 5 in the country to the NCAA Tournament is improbable enough. —Steve Kornacki, NBC News, 20 Mar. 2025

Nicholson does the highly improbable — portraying a delusional stalker that viewers will warm to. —EW.com, 14 Mar. 2025

But the show’s potential for improbable magic is all there, too. —Kathryn Vanarendonk, Vulture, 19 Mar. 2025

Japanese production company King Records has achieved something close to that improbable scenario with the innovative musical anime feature Hypnosis Mic: Division Rap Battle, which the company says is the world’s first fully interactive theatrical film. —Patrick Brzeski, The Hollywood Reporter, 18 Mar. 2025