Synonyms to mercurial mind

acuity, 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, 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, a thing for, ability, admissibility, affinity, an ear