| alert(intelligent, attentive, watchful, sharp-eyed) |
| aware(attentive, observant) |
| observant(adjective, sympathetic, alert, witting, attentive) |
| regardful(adjective, correct, alert, intelligent, attentive) |
| advertent(adjective, correct, sympathetic, alert, intelligent) |
| agog |
| attentive(alert, intelligent, watchful, observant, sharp-eyed) |
| careful(attentive, observant) |
| heedful(alert, intelligent, attentive, watchful, observant) |
| mindful(correct, alert, intelligent, perceptive, attentive) |
| on the ball(expression, idiom, alert, intelligent, attentive) |
| watchful(alert, intelligent, attentive, observant, sharp-eyed) |
| alive(correct, alert, intelligent, perceptive, attentive) |
| all ears |
| assiduous |
| bright(alert, intelligent, perceptive, attentive, watchful) |
| clear-sighted(adjective, correct, sympathetic, alert, intelligent) |
| comprehending(correct, sympathetic, alert, intelligent, attentive) |
| concentrated |
| conscious |