| clear-sighted(adjective, sensible, wise, shrewd) |
| cognizant(adjective, cool, significant, familiar, intelligent) |
| comical(adjective, witty) |
| conscious(adjective, cool, significant, familiar, intelligent) |
| conversant(adjective, cool, significant, familiar, intelligent) |
| cool(adjective, sensible, significant, intelligent, brilliant) |
| crack(adjective, cool, smart, significant, intelligent) |
| crackerjack(smart, bright, intelligent, skillful, nimble) |
| creative |
| critical(keen, sharp, caustic, sarcastic, questioning) |
| cutting(adjective, strong, keen, sharp, smart) |
| dapper |
| dashing |
| deep(adjective, strong, keen, sharp, smart) |
| deliberate(adjective, cool, smart, significant, intelligent) |
| discreet(smart, sensible, wise, shrewd, clever) |
| discriminating(sharp, smart, sensible, intelligent, wise) |
| dry(adjective, witty) |
| eggheaded(smart, alert, brilliant, perceptive, skillful) |
| energetic |