| sapient(adjective, sound, reasonable, sharp, smart) |
| apprehensive(adjective, cool, significant, intelligent, brilliant) |
| apt(adjective, smart, bright, intelligent, wise) |
| collected(sound, reasonable, sensible, alert, rational) |
| cultivated(adjective, sharp, superior, sophisticated, refined) |
| demanding(adjective, fastidious) |
| educated(sound, sharp, sensible, familiar, intelligent) |
| enlightened(adjective, sound, reasonable, sharp, rational) |
| logical(adjective, clear, sound, reasonable, sensible) |
| observing(verb, adjective, understanding, keen, sensible) |
| particular(adjective, severe, sharp, harsh, refined) |
| perspicuous(adjective, clear, sound, reasonable, sensible) |
| politic(adjective, sensible, sensitive, wise, cautious) |
| prescient(adjective, smart, familiar, psychic, clairvoyant) |
| rumination(noun, understanding, attention, thought, hope) |
| ruminative(adjective, reasonable, rational, intelligent, thoughtful) |
| sane(adjective, sound, reasonable, sensible, rational) |
| savvy(adjective, understanding, smooth, keen, sharp) |
| able(adjective, smart, bright, intelligent, brainy) |
| adroit(adjective, keen, smart, bright, sensitive) |