| crackerjack(adjective, good, smooth, smart, bright) |
| cutting(sharp, smart, intelligent, clever, astute) |
| deft(expert, skilled, capable, skillful, subtle) |
| deliberate(adjective, cool, crack, significant, intelligent) |
| deliberative(adjective, reasonable, keen, deep, rational) |
| discreet(understanding, keen, alert, sensitive, perceptive) |
| discriminating(sharp, smart, intelligent, clever, astute) |
| ear to the ground(expression, adjective, idiom, understanding, keen) |
| earnest(adjective, reasonable, keen, sensible, deep) |
| encyclopedic(adjective, intelligent) |
| engrossed(adjective, reasonable, keen, deep, rational) |
| enlightened(adjective, smart, bright, familiar, knowledgeable) |
| esoteric(knowledgeable, cultured, educated, erudite, enlightened) |
| familiar with(adjective, knowledge, experience, skill, expert) |
| farsighted(adjective, smooth, reasonable, keen, sharp) |
| fast |
| fly(adjective, knowledge, experience, skill, expert) |
| foxy(adjective, smooth, keen, sharp, smart) |
| grave(adjective, reasonable, keen, sensible, sober) |
| grounded(knowledgeable, cultured, educated, erudite, enlightened) |