| at concert pitch(expression, idiom) |
| authorized(adjective, smart, experience, know, capable) |
| be up on(careful, knowledgeable, cautious, aware, attentive) |
| bookish(knowledgeable, cultured, educated, erudite, enlightened) |
| brainy(adjective, understanding, cool, significant, familiar) |
| briefed(adjective, knowledgeable, aware, informed, savvy) |
| bright(adjective, cool, crack, significant, familiar) |
| brilliant(adjective, cool, crack, significant, familiar) |
| cagey(careful, aware, attentive, wary, watchful) |
| canny(adjective, cool, reasonable, significant, rational) |
| career |
| cautious(careful, knowledgeable, aware, attentive, wary) |
| certain(adjective, understanding, keen, sensible, alert) |
| chary(careful, knowledgeable, cautious, aware, attentive) |
| coached |
| concerned |
| conscientious(careful, knowledgeable, aware, attentive, wary) |
| consequent(adjective, reasonable, rational, intelligent, sober) |
| conversant with |
| crack(adjective, cool, skill, significant, intelligent) |