genius
noun
1 the world had already heard of Hawking's genius:
brilliance, great intelligence, great intellect, great ability, cleverness, brains, erudition, wisdom, sagacity, fine mind, wit, artistry, flair, creative power, precocity, precociousness.
▷antonyms stupidity.
2 that woman has a genius for organization:
talent, gift, flair, aptitude, facility, knack, technique, touch, bent, ability, expertise, capacity, power, faculty;
endowment, strength, strong point, forte, brilliance;
dexterity, adroitness, skill, cleverness, virtuosity, artistry.
3 the boy is an absolute genius:
brilliant person, mental giant, mastermind, Einstein, intellectual, intellect, brain, highbrow, expert, master, artist, polymath;
prodigy, gifted child;
French idiot savant;
informal egghead, brains, bright spark, whiz, wizard, ninja, alpha geek, walking encyclopedia;
British, informal brainbox, clever clogs, boffin;
North American, informal brainiac, rocket scientist, maven.
▷antonyms dunce.