Synonyms and related words :
Rocky Mountain canary, ass, born fool, buffoon, burro, clown, cuddy, dickey, donkey, doodle, egregious ass, figure of fun, fool, idiot, ignoramus, imbecile, jack, jennet, jenny, jenny ass, jerk, lunatic, milksop, mooncalf, neddy, nincompoop, perfect fool, schmuck, stupid ass, tomfool, zany