| attentive(reasonable, thoughtful, thinking, absorbed, pensive) |
| brainy(adjective, reasonable, keen, deep, rational) |
| bright(adjective, rational, intelligent, thoughtful) |
| calculating(adjective, reasonable, keen, sensible, deep) |
| cerebral(adjective, reasonable, keen, deep, rational) |
| cerebration |
| cogitating |
| cognitive |
| conceptual |
| cunning(adjective, reasonable, sensible, careful, intelligent) |
| deep(adjective, reasonable, keen, rational, thoughtful) |
| deliberating(adjective, rational, intelligent, thoughtful) |
| discerning(adjective, reasonable, keen, sensible, deep) |
| earnest(adjective, reasonable, keen, deep, rational) |
| farsighted(adjective, reasonable, keen, deep, rational) |
| grave(adjective, reasonable, keen, deep, rational) |
| intellection |
| intent(adjective, reasonable, keen, deep, rational) |
| judicious(sensible, intelligent, moral, sage, theoretical) |
| keen(adjective, reasonable, sensible, deep, rational) |