Synonyms for stupid

modified

1. Foolish

   senseless, brainless, idiotic, simple, ignorant, shallow, ill-advised, imprudent, witless, irrational, inane, ridiculous, mindless, ludicrous, blind, muddled, absurd, half-witted, funny, comical, silly, laughable, nonsensical, daft, illogical, indiscreet, unintelligent, irresponsible, coquettish, shallow-brained, scatterbrained, crackbrained, addled, inconsistent, flirting, unwary, incautious, misguided, wild, injudicious, imbecile, addleheaded, lunatic, insane, mad, crazy, moronic, touched, freakish, comic, puerile, inexpedient, narrow-minded, incoherent, childish, anile, senile, monstrous, outrageous, far-fetched, extravagant, preposterous, unreasonable, chimerical, asinine, useless, unwise, thoughtless, careless, vain, fatuous, light, light-headed, flighty, madcap, giddy, cuckoo*, dippy*, not seeking for looking*, boneheaded*, goofy*, cracked*, dumb*, half-baked*, in the dark*, having a block for a head*, not knowing what's what*, in darkness*, dead to the world*, in a daze*, knowing nothing*, groping in the dark*, green*, wacky*, harebrained*, tetched*, damn-fool*, block-headed*, not seeing an inch beyond one's nose*, screwy*, bats*, cock-eyed*, loony*, batty*, nutty*.

   Antonyms sane*, wise, judicious.

2. Dull

   dense, obtuse, slow, retarded, dull-witted; see also dull 3, shallow 2. See syn. study at silly.

stupid implies a lack of intelligence or an incapacity for perceiving or learning such as might be shown by one in a mental stupor a stupid idea; dull implies a mental sluggishness that may be constitutional or may result from fatigue, disease, etc. the fever left me dull and listless; dense suggests obtuseness, or an irritating failure to understand quickly or to react intelligently too dense to take a hint; slow suggests that the quickness to learn, but not necessarily the capacity for learning, is below average a pupil slow in most studies; retarded is applied to those behind others of the same age or class because of mental deficiency a retarded pupil