improbable Synonyms

unlikely unbelievable incredible marvelous marvellous remote not likely inconceivable rare unconvincing questionable slender dubious slim tall doubtful unrealistic beyond belief uncredible unexpected wonderwork unreal unthinkable unusual weak slimmer far fetched unimaginable a long shot not in the cards difficult to believe cock-and-bull hard to swallow hardly likely highly unlikely wonderworking untrusty unthought-of unsuspected unpromising unpredicted unpersuasive unfeasible out of the question unimagined a stretch unconceivable uncertain incogitable inapprehensible