| competent(adjective, good, cool, smart, bright) |
| enlightened(adjective, smart, bright, sensible, wise) |
| erudite(adjective, smart, familiar, intelligent, brilliant) |
| hep(smart, shrewd, clever, subtle, artful) |
| light |
| masterful(skillful, nimble, practiced) |
| penetrative(adjective, smart, intelligent, clever, skillful) |
| piercing(adjective, strong, keen, sharp, smart) |
| quick-thinking(bright, sharp-witted) |
| sapient(adjective, bright, sensible, intelligent, wise) |
| sensitive(adjective, sharp, shrewd, perceptive, penetrating) |
| sharp-sighted(adjective, smart, intelligent, clever, skillful) |
| skilful |
| skilled(adjective, good, keen, sharp, smart) |
| skillful(adjective, cool, smart, bright, sensible) |
| sound(adjective, sensible, alert, wise, shrewd) |
| thinking(smart, bright, brainy) |
| waggish(adjective, witty) |
| whiz(adjective, smart, bright, informal, intelligent) |
| Einstein(smart, alert, brilliant, perceptive, skillful) |