| discerning(adjective, understanding, sound, reasonable, keen) |
| perceptive(adjective, person, keen, sharp, smart) |
| astute(adjective, understanding, keen, sharp, ability) |
| intelligent(adjective, sound, reasonable, keen, sharp) |
| shrewd(adjective, keen, sharp, ability, smart) |
| sagacious(adjective, understanding, sound, smooth, reasonable) |
| wise(adjective, understanding, sound, reasonable, keen) |
| acute(adjective, understanding, keen, sharp, smart) |
| sharp(adjective, smart, intelligent, wise, perceptive) |
| keen(adjective, understanding, sharp, smart, bright) |
| percipient(adjective, understanding, keen, sharp, sensitive) |
| clever(adjective, keen, sharp, smart, bright) |
| canny(adjective, keen, sharp, ability, smart) |
| discriminating(adjective, sound, reasonable, keen, sharp) |
| smart(adjective, sharp, ability, bright, careful) |
| penetrating(adjective, sharp, sensitive, intelligent, perceptive) |
| judicious(adjective, sharp, smart, thoughtful, wise) |
| quick(adjective, understanding, keen, sharp, smart) |
| rational(adjective, understanding, sound, reasonable, keen) |
| alert(adjective, understanding, keen, bright, perceptive) |