Synonyms and related words :
acridity, acumen, acumination, acuteness, adroitness, agility, alertness, apperception, aptitude, aptness, astuteness, attention, attentiveness, braininess, brightness, brilliance, clear thinking, cleverness, cogency, dexterity, discernment, edge, esprit, farseeingness, farsightedness, flair, foresight, foresightedness, genius, giftedness, gifts, incisiveness, insight, keen-wittedness, keenness, longheadedness, longsightedness, mental alertness, mercurial mind, mucronation, native cleverness, nimble mind, nimble-wittedness, nimbleness, nous, penetration, perception, perceptiveness, percipience, perspicaciousness, perspicacity, perspicuity, perspicuousness, pointedness, prickliness, promptitude, promptness, providence, punctuality, quick parts, quick thinking, quick wit, quick-wittedness, quickness, readiness, ready wit, sagaciousness, sagacity, savvy, sensibility, sharp-wittedness, sharpness, sleeplessness, smartness, smarts, spinosity, sprightly wit, talent, thorniness, trenchancy, wakefulness