| perceptive(adjective, understanding, cool, smooth, keen) |
| sagacious(adjective, understanding, cool, keen, sharp) |
| wise(adjective, understanding, cool, smooth, reasonable) |
| bright(adjective, cool, smart, significant, familiar) |
| insightful(adjective, understanding, cool, smooth, keen) |
| knowledgeable(adjective, understanding, cool, smooth, keen) |
| sage(adjective, understanding, cool, keen, sharp) |
| sensible(adjective, understanding, cool, smooth, sharp) |
| alive(adjective, cool, crack, significant, intelligent) |
| apprehensive(adjective, cool, crack, significant, intelligent) |
| astute(adjective, understanding, cool, keen, sharp) |
| awake(adjective, understanding, cool, keen, sharp) |
| aware(adjective, understanding, cool, keen, sharp) |
| brainy(adjective, understanding, cool, keen, sharp) |
| brilliant(adjective, cool, smart, crack, significant) |
| canny(adjective, cool, smooth, sharp, significant) |
| cognizant(adjective, understanding, cool, crack, significant) |
| competent(adjective, cool, significant, intelligent, brilliant) |
| conscious(adjective, understanding, cool, keen, sharp) |
| conversant(adjective, understanding, cool, crack, significant) |