Synonyms:
- a bit thick,
- a bit thin,
- absurd,
- amusing,
- antic,
- barred,
- beyond belief,
- bizarre,
- closed-out,
- cockamamie,
- comic,
- comical,
- contrary to reason,
- crazy,
- doubtable,
- doubtful,
- droll,
- dubious,
- dubitable,
- eccentric,
- excluded,
- extravagant,
- fantastic,
- farcical,
- foolish,
- funny,
- grotesque,
- hard of belief,
- hard to believe,
- high-flown,
- hilarious,
- hopeless,
- humorous,
- implausible,
- impossible,
- improper,
- inane,
- inconceivable,
- incongruous,
- incredible,
- indecent,
- indelicate,
- insane,
- laughable,
- logically impossible,
- ludicrous,
- malodorous,
- mirthful,
- monstrous,
- nonsensical,
- not deserving belief,
- not possible,
- open to doubt,
- open to suspicion,
- outlandish,
- outrageous,
- outre,
- oxymoronic,
- paradoxical,
- passing belief,
- poppycockish,
- preposterous,
- priceless,
- problematic,
- prohibited,
- quaint,
- queer,
- questionable,
- quizzical,
- rich,
- risible,
- rough,
- ruled-out,
- screaming,
- self-contradictory,
- silly,
- staggering belief,
- stupid,
- suspect,
- suspicious,
- tall,
- thick,
- thin,
- unbecoming,
- unbelievable,
- unconvincing,
- undecorous,
- unearthly,
- ungodly,
- unimaginable,
- unseemly,
- unthinkable,
- unworthy of belief,
- weird,
- whimsical,
- wild,
- witty,
- zany