| quick-witted(adjective, cool, significant, familiar, intelligent) |
| ready |
| recognizing(adjective, understanding, keen, sensible, certain) |
| recondite(knowledgeable, cultured, educated, erudite, enlightened) |
| 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, cool, reasonable, significant) |
| savvy(adjective, understanding, sensible, familiar, knowledgeable) |
| scholarly(familiar, knowledgeable, informed, cultured, educated) |
| scholastic |
| scientific(knowledgeable, cultured, educated, erudite, enlightened) |
| seeing(adjective, understanding, keen, sensible, certain) |
| sensitive to(expression, adjective, understanding, keen, sensible) |
| sharp(adjective, understanding, cool, significant, familiar) |
| skillful(adjective, cool, skill, significant, deep) |
| sociable |
| solemn(knowledgeable, cultured, educated, erudite, enlightened) |
| solicitous(careful, knowledgeable, cautious, aware, attentive) |