List of idiotic synonyms and idiotic related words.
apish, arrested, asinine, babbling, backward, batty, befooled, beguiled, besotted, blithering, brainless, buffoonish, burbling, cockeyed, crackbrained, cracked, crazy, credulous, cretinistic, cretinous, daffy, daft, dazed, dithering, dizzy, doting, driveling, drooling, dumb, fatuitous, fatuous, flaky, fond, fool, foolheaded, foolish, fuddled, futile, gaga, goofy, gulled, half-baked, half-witted, imbecile, imbecilic, inane, inept, infatuated, insane, kooky, loony, mad, maudlin, maundering, mentally defective, mentally deficient, mentally handicapped, mentally retarded, mongoloid, moronic, not all there, nutty, retarded, sappy, screwy, senseless, sentimental, silly, simple, simpleminded, simpletonian, slobbering, stupid, subnormal, thoughtless, wacky, wet, witless