noun

Sharpness or keenness of thought, vision, or hearing.

intellectual acuity

insight,discernment,perception,perceptiveness,intelligence,sharp-wittedness,quick-wittedness,cleverness,smartness,incisiveness,keenness,sharpness,trenchancy,astuteness,shrewdness,acuteness,subtlety,clarity,acuity,discrimination,sensitivity,thoughtfulness,profundity,percipience,perspicacity,perspicuity,sagacity