Synonyms and related words :
Pickwickian, absurd, asinine, askew, beyond belief, bizarre, cockamamie, crazy, dumb, extravagant, fantastic, fool, foolish, grotesque, high-flown, idiotic, imbecilic, incredible, irrational, laughable, loony, ludicrous, mad, meaningless, monstrous, moronic, nutty, outrageous, outre, poppycockish, preposterous, ridiculous, rubbishy, screwball, screwy, senseless, silly, skimble-skamble, stupid, trashy, twaddling, twaddly, warped, weird, wild