| fast(adjective, mind, quickness, possession, activity) |
| foxy(adjective, smooth, keen, sharp, smart) |
| healthy(adjective, sound, sensible, rational, stable) |
| responsible(adjective, smart, characteristic, keen, bright) |
| sensitive(adjective, understanding, sharp, obscure, smart) |
| agile(adjective, keen, smart, competent, clever) |
| commonsensical(adjective, clear, sound, reasonable, sensible) |
| consequent(adjective, clear, sound, reasonable, reason) |
| deft(adjective, smooth, keen, sharp, smart) |
| dexterous(adjective, keen, smart, bright, active) |
| have a good head on one's shoulders(expression, informal, idiom, characteristic, intelligence) |
| highbrow(adjective, smart, intellectual, characteristic, bright) |
| know how many beans make five(expression, informal, british, idiom, characteristic) |
| level-headed(adjective, sound, reasonable, sensible, rational) |
| observant(adjective, understanding, cool, sharp, smart) |
| original(adjective, smart, characteristic, keen, bright) |
| politic(adjective, sensible, cautious, shrewd, sage) |
| skilled(adjective, knowledge, keen, smart, bright) |
| sophisticated(adjective, cool, significant, familiar, polite) |
| expert(adjective, cool, keen, smart, bright) |