airheads, birdbrains, blockheads, boneheads, bubbleheads, chowderheads, chuckleheads, clodpolls(or clodpoles), clots(British), clucks, clunks, cretins, cuddies(British dialect), deadheads, dim bulbs(slang), dimwits, dips, dodoes(or dodos), dolts, donkeys, doofuses(also dufuses, slang), dopes, dorks(slang), dullards, dumbbells, dumbheads, dum-dums, dummies, dummkopfs, dunces, dunderheads, fatheads, ganders, golems, goofs, goons, half-wits, hammerheads, hardheads, idiots, ignoramuses(also ignorami), imbeciles, jackasses, know-nothings, knuckleheads, lamebrains, loggerheads(chiefly dialect), loons, lumps, lunkheads, meatheads, momes(archaic), morons, mugs(chiefly British), mutts, naturals, nimrods(slang), nincompoops, ninnies, ninnyhammers, nits(chiefly British), nitwits, noddies, noodles, numskulls(or numbskulls), oafs, pinheads, prats(British), sapheads, schlubs(also shlubs, slang), schnooks(slang), simpletons, stocks, stupes, stupids, thickheads, turkeys, woodenheads, yahoos, yo-yos

boobies, buffoons, fools, geese, loonies, lunatics, madmen, nuts, zanieslosersgawksfeatherbrains, scatterbrainsbeasts, boors, cads, churls, clowns, creeps, curs, heels, jerks, skunks(also skunk), snakes, stinkers, villains

dumb clucks