| apprehensive(adjective, cool, significant, intelligent, brilliant) |
| astringent |
| astucious(sharp, smart, false, intelligent, wise) |
| autodidactic(adjective, learner) |
| bullheaded(adjective, hard, tough, sharp, practical) |
| businesslike(adjective, hard, sound, tough, reasonable) |
| calculative |
| cautious(adjective, kind, reasonable, smart, sensible) |
| cleverer |
| cleverest |
| comical(adjective, witty) |
| common-sense(adjective, reasonable) |
| commonsense(hard, sound, reasonable, sensible, practical) |
| competent(adjective, good, cool, keen, smart) |
| consequent(adjective, reasonable, rational, sober, wise) |
| considerate(adjective, kind, reasonable, friendly, sensible) |
| considered(adjective, sensible, wise, shrewd) |
| contriving(cunning, subtle, tactful, suave) |
| conversant(adjective, understanding, cool, reasonable, significant) |
| cool(adjective, sound, tough, reasonable, sharp) |