Synonyms and related words :
Boeotian, block, blockhead, bonehead, boob, booby, bufflehead, cabbagehead, chowderhead, chucklehead, chump, clod, clodpate, clodpoll, cluck, dabbler, dilettante, dimwit, dodo, dolt, dolthead, donkey, dope, drip, duffer, dullard, dullhead, dumb, dumb cluck, dumbbell, dummy, fool, gowk, greenhorn, greeny, ignoramus, illiterate, illiterati, jobbernowl, know-nothing, lackwit, lamebrain, lightweight, looby, loon, lowbrow, middlebrow, niais, nincompoop, ninny, ninnyhammer, nitwit, no scholar, noddy, puddinghead, put, stupid, tenderfoot, thickwit, unintelligentsia, witling