Synonyms of improbable

Adjective

1. improbable (vs. probable), unlikely, supposed(prenominal)

usage: not likely to be true or to occur or to have occurred; "legislation on the question is highly unlikely"; "an improbable event"

2. improbable, unbelievable, unconvincing, unlikely, implausible (vs. plausible)

usage: having a probability too low to inspire belief

3. improbable, marvelous, marvellous, tall(prenominal), incredible (vs. credible), unbelievable

usage: too improbable to admit of belief; "a tall story"

Definition and meaning of improbable (Dictionary)