| regardful(adjective, careful, knowledgeable, cautious, aware) |
| reliable(adjective, knowledgeable, aware, informed, savvy) |
| respectful(adjective, careful, knowledgeable, cautious, aware) |
| sagacious(adjective, understanding, smooth, keen, sharp) |
| sage(adjective, understanding, keen, sharp, sensitive) |
| seasoned(adjective, smart, practical, expert, skilled) |
| seeing(adjective, understanding, keen, fine, sensible) |
| sensatory(adjective, understanding, keen, fine, sensible) |
| sensile(adjective, understanding, keen, fine, sensible) |
| sensorial(adjective, understanding, keen, fine, sensible) |
| sensory(adjective, understanding, keen, fine, sensible) |
| shrewd(adjective, understanding, sharp, smart, wise) |
| simpatico(adjective, cool, friendly, agreeable, down) |
| skilled(adjective, smart, practical, expert, competent) |
| skillful(adjective, smart, intelligent, brilliant, sophisticated) |
| smart(adjective, understanding, smooth, sharp, intelligent) |
| smooth(adjective, cool, smart, wise, practical) |
| solicitous(adjective, careful, knowledgeable, cautious, aware) |
| sophic(adjective, understanding, keen, sharp, alert) |
| supersensitive(adjective, understanding, keen, fine, sensible) |