| gnostic(adjective, understanding, keen, sharp, alert) |
| guarded(adjective, cautious, tactful, circumspect) |
| heedful(adjective, alert, intelligent, cautious, attentive) |
| highbrow(smart, bright, enlightened, brainy, studious) |
| hypercritical(adjective, fastidious) |
| imaginative(adjective, smart, bright, brainy) |
| intellectual(adjective, sound, reasonable, smart, bright) |
| intense(sharp, shrewd, perceptive, penetrating, searching) |
| intuitive(adjective, understanding, sound, keen, sharp) |
| lucid(clear, sound, reasonable, sensible, healthy) |
| nimble-witted(bright, sharp-witted, intelligence wisdom, quick-thinking) |
| normal(sound, reasonable, sensible, rational, healthy) |
| noticing(verb, adjective, understanding, keen, sensible) |
| persnickety(adjective, sharp, precise, refined, critical) |
| polite(adjective, superior, sensitive, sophisticated, advanced) |
| prophetic(adjective, wise, psychic, clairvoyant, visionary) |
| prudish(adjective, fastidious) |
| punctilious(adjective, superior, sophisticated, advanced, fastidious) |
| reflective(adjective, sound, reasonable, sharp, smart) |
| responsive(adjective, understanding, keen, sharp, smart) |