Synonyms and related words :
absurd, amusing, beyond belief, bizarre, cockamamie, crazy, droll, eccentric, extravagant, fantastic, foolish, funny, grotesque, high-flown, hilarious, humorous, incongruous, incredible, ludicrous, monstrous, nonsensical, outrageous, outre, poppycockish, preposterous, priceless, quaint, quizzical, rich, ridiculous, risible, screaming, weird, whimsical, wild, witty