Synonyms and Antonyms of unconceivable
too extraordinary or improbable to believe
- It's unconceivable that a once-promising actor could end up this way.
debatable, disputable, doubtable, doubtful, dubious, dubitable, far-fetched, fishy, flimsy, questionable, shaky, suspect, suspicious, unlikely, unreasonable
absurd, comical, farcical, laughable, ludicrous, outlandish, preposterous, ridiculous, risible, silly
indefensible, insupportable, untenable
likely, possible, probable
certain, incontestable, indisputable, indubitable, questionless, sure, undeniable, undoubted, unquestionable