brilliant

Synonyms

alert, brainy, bright, clever, exceptional, fast, hyperintelligent, intelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart;

Antonyms

airheaded, birdbrained, boneheaded, brain-dead, brainless, bubbleheaded, chuckleheaded, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, half-witted, knuckleheaded, lamebrain (or lamebrained), lunkheaded, mindless, obtuse, opaque, pinheaded, senseless, simple, slow, slow-witted, soft, softheaded, stupid, thick, thickheaded, thick-witted, unintelligent, vacuous, weak-minded, witless;

Near Antonyms

feebleminded, simpleminded;

ignorant, illiterate, lowbrow, nonintellectual, unacademic, uneducated, uninformed, unintellectual, untaught, unthinking;

absurd, asinine, balmy, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, fool, half-baked, harebrained, insane, kooky (also kookie), loony (also looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, tomfool, wacky (also whacky), zany;

Related Words

apt, ingenious, resourceful;

acute, astute, discerning, heady, insightful, knowing, perceptive, percipient, perspicacious, sagacious, sapient, savvy, wise;

cerebral, erudite, genial, highbrow, knowledgeable, learned, literate, scholarly, well-read;

creative, inventive, judicious, prudent, sage, sane, sapient, sensible, sound, wise;

crafty, cunning, foxy, shrewd, wily;

logical, rational, reasonable;