| clear-sighted(alert, intelligent, attentive, watchful, sharp-eyed) |
| conscious(familiar, careful, cautious, aware, informed) |
| crackerjack(adjective, smooth, smart, bright, clean) |
| cute(skillful, nimble, practiced) |
| gifted(adjective, smart, bright, intelligent, skilled) |
| good(adjective, sharp, smart, bright, useful) |
| hip(cool, sharp, fair, agreeable, lively) |
| intent(considerate, responsive, aware, helpful, conscientious) |
| intentive(alert, intelligent, attentive, watchful, sharp-eyed) |
| knowing(adjective, smooth, keen, sharp, smart) |
| lively(adjective, sharp, bright, alert, aware) |
| nimble(smart, bright, intelligent, skillful, practiced) |
| observing(adjective, careful, knowledgeable, cautious, aware) |
| on one's toes(adjective, adverb, attention, alert) |
| on the alert(expression, idiom, alert, aware, attentive) |
| on the beam(expression, idiom, fair, agreeable, proper) |
| on the qui vive(expression, idiom, keen, sharp, bright) |
| professional(adjective, smart, practical, expert, skilled) |
| quick on the uptake(expression, idiom, smart, bright, clever) |
| regardful(adjective, alert, careful, caring, thoughtful) |