| busy(adjective, active, occupied, running, working) |
| alert(adjective, adverb, keen, sharp, bright) |
| on the ball(expression, adjective, idiom, adverb, keen) |
| working(adjective, active, busy, occupied, running) |
| attentive(adjective, adverb, keen, sharp, bright) |
| on the alert(expression, adjective, idiom, alert, attentive) |
| watchful(adjective, keen, sharp, bright, lively) |
| wide-awake(adjective, adverb, keen, sharp, bright) |
| agog(adjective, keen, anxious, alert, careful) |
| alive(adjective, adverb, sharp, running, functioning) |
| all ears(expression, adjective, sharp, bright, lively) |
| aware(adjective, keen, careful, considerate, attentive) |
| careful(adjective, keen, sharp, bright, lively) |
| employed(adjective, active, busy, occupied, running) |
| heedful(adjective, sharp, bright, lively, alert) |
| mindful(adjective, considerate, responsive, aware, attentive) |
| observant(adjective, keen, sharp, bright, lively) |
| on duty(expression, adjective, active, busy, occupied) |
| open-eyed(adjective, keen, anxious, alert, careful) |
| ready(adjective, adverb, sharp, bright, lively) |