| receptive(adjective, alert, familiar, wise, knowledgeable) |
| recognizing(adjective, understanding, keen, sensible, certain) |
| red-hot(adjective, present, new, current, modern) |
| regardful(careful, knowledgeable, aware, attentive, wary) |
| remarking(adjective, understanding, keen, sensible, certain) |
| respectful(careful, knowledgeable, cautious, aware, attentive) |
| responsive(adjective, understanding, keen, sensible, certain) |
| sagacious(adjective, understanding, reasonable, familiar, rational) |
| sage(adjective, understanding, reasonable, familiar, rational) |
| scholarly(adjective, familiar, polite, sophisticated, refined) |
| screw up |
| seeing(adjective, understanding, keen, sensible, certain) |
| sensitive to(expression, adjective, understanding, keen, sensible) |
| sharp(adjective, understanding, alert, familiar, wise) |
| solicitous(careful, knowledgeable, cautious, aware, attentive) |
| spick-and-span(adjective, unusual, strange, fresh, original) |
| strange(adjective, unusual, fresh, original, current) |
| supraliminal(adjective, understanding, keen, sensible, certain) |
| sure(adjective, understanding, keen, sensible, certain) |
| thoughtful(careful, knowledgeable, cautious, aware, attentive) |