Synonyms and Antonyms of ludicrous
- the ludicrous sight of their teacher in a Halloween costume
antic, chucklesome, comedic, comic, comical, droll, farcical, funny, hilarious, humoristic, humorous, hysterical (also hysteric), killing, laughable, ridiculous, riotous, risible, screaming, sidesplitting, uproarious
- a ludicrous and easily detected attempt to forge his father's signature on a note to school
absurd, cockamamy (or cockamamie), comical, derisive, derisory, farcical, laughable, pathetic, preposterous, ridiculous, risible, silly
asinine, brainless, dumb, fatuous, foolish, half-baked, half-witted, harebrained, idiotic (also idiotical), imbecile (or imbecilic), inane, jerky, moronic, nonsensical, simpleminded, stupid, unwise, weak-minded, witless
balmy, cockeyed, crazy, cuckoo, daffy, daft, dotty, insane, kooky (also kookie), loony (also looney), lunatic, mad, nutty, screwball, senseless, wacky (also whacky)
fantastic (also fantastical), far-fetched, inconceivable, incredible, unbelievable, unreal, unrealistic, unreasonable