All improbable synonyms
im·prob·a·ble
I i adj improbable
- implausible — not plausible; not having the appearance of truth or credibility: an implausible alibi.
- rare — Réseaux Associés pour la Recherche Européenne
- unbelievable — too dubious or improbable to be believed: an unbelievable excuse.
- fanciful — characterized by or showing fancy; capricious or whimsical in appearance: a fanciful design of butterflies and flowers.
- unlikely — not likely to be or occur; improbable; marked by doubt.
- doubtful — of uncertain outcome or result.
- dubious — doubtful; marked by or occasioning doubt: a dubious reply.
- far-fetched — improbable; not naturally pertinent; being only remotely connected; forced; strained: He brought in a far-fetched example in an effort to prove his point.
- flimsy — without material strength or solidity: a flimsy fabric; a flimsy structure.
- iffy — full of unresolved points or questions: an iffy situation.
- inconceivable — not conceivable; unimaginable; unthinkable.
- questionable — of doubtful propriety, honesty, morality, respectability, etc.: questionable activities; in questionable taste.
- slim — slender, as in girth or form; slight in build or structure.
- uncertain — not definitely ascertainable or fixed, as in time of occurrence, number, dimensions, or quality.
- unconvincing — persuading or assuring by argument or evidence: They gave a convincing demonstration of the car's safety features.
- unimaginable — capable of being imagined or conceived.
- unsubstantial — not substantial; having no foundation in fact; fanciful; insubstantial: an unsubstantial argument; unsubstantial hopes.
- weak — not strong; liable to yield, break, or collapse under pressure or strain; fragile; frail: a weak fortress; a weak spot in armor.
- outside chance — a slight chance or likelihood
- unheard of — that was never heard of; unknown: an unheard-of artist.
adjective improbable
- impracticable — not practicable; incapable of being put into practice with the available means: an impracticable plan.
- incredible — so extraordinary as to seem impossible: incredible speed.