Idiotic, Idle, Ignorant, Illogical, Imbecile, Imbecilic, Impetuous, Impish, Impolitic, Imprudent, Inane, Incautious, Incredible, Indiscreet, Inept, Infatuated, Injudicious, Insane, Irrational, Knavish, Laughable, Light, Loony, Ludicrous, Mad, Maudlin, Mindless, Mischievous, Misguided, Monstrous, Moronic, Nonsensical, Nuts, Nutty, Obtuse, Outrageous, Playful, Potty, Preposterous, Rash, Reasonless, Reckless, Ridiculous, Roguish, Rubbishy, Screwy, Senseless, Sentimental, Shallow, Silly, Slender, Slight, Sportive, Stolid, Stupid, Superficial, Thick, Thoughtless, Trashy, Trifling, Trite, Trivial, Unintellectual, Unintelligent, Unorthodox, Absurd, Airy, Apish, Arch, Asinine, Batty, Beguiled, Bemused, Besotted, Bizarre, Brainless, Brash, Cockeyed, Confused, Crazy, Credulous, Cuckoo, Daffy, Daft, Dazed, Demented, Devilish, Dim, Dizzy, Dopey, Doting, Dotty, Dumb, Elvish, Empty, Erratic, Extravagant, Fantastic, Fatuous, Feebleminded, Flaky, Flimsy, Fond, Fool, Foolhardy, Frivolous, Frothy, Fuddled, Futile, Gaga, Goofy, Grotesque, Hasty, Headless, Headlong, Heedless, Unreasonable, Unreasoning, Unstable, Untalented, Unthinking, Unwary, Unwise, Vacuous, Vain, Vapid, Wacky, Waggish, Weird, Wet, Wild, Windy, Witless