| genius(adjective, intelligent) |
| guarded(adjective, careful, cautious, prudent, tactful) |
| heedful(adjective, careful, cautious, prudent, tactful) |
| incisive(adjective, understanding, keen, sharp, smart) |
| inventive(adjective, smart, bright, intelligent) |
| master |
| mindful(perceptive, observant, insightful) |
| normal(sound, reasonable, sensible, rational, healthy) |
| not born yesterday(expression, idiom, smart, shrewd, perceptive) |
| observant(adjective, understanding, cool, reasonable, keen) |
| omniscient(smart, familiar, intelligent, brilliant, wise) |
| perspicuous |
| philosophic(adjective, sound, reasonable, sensible, moral) |
| prophetic(adjective, clairvoyant) |
| ripe(adjective, experienced, developed) |
| skilled(adjective, smart, bright, ready, deep) |
| slick(adjective, cool, smooth, keen, sharp) |
| tactful(smooth, sensible, intelligent, wise, cautious) |
| thoughtful(adjective, sound, reasonable, sharp, sensible) |
| well-founded(adjective, reason, sane) |