| watchful(adjective, alert, restless, feature, characteristic) |
| vigilant(adjective, sharp, care, alert, careful) |
| alert(adjective, keen, sharp, bright, careful) |
| awake(adjective, care, alert, careful, restless) |
| sleepless(adjective, keen, anxious, alert, careful) |
| observant(adjective, keen, alert, careful, restless) |
| open-eyed(adjective, keen, anxious, alert, careful) |
| wary(adjective, keen, alert, careful, restless) |
| attentive(adjective, keen, alert, careful, restless) |
| alive(adjective, alert, careful, restless, disturbed) |
| restless(adjective, disturbed, sleepless, insomniac) |
| unsleeping(adjective, keen, anxious, alert, careful) |
| waking(verb, adjective, alert, careful, restless) |
| wide-awake(adjective, keen, anxious, alert, careful) |
| argus-eyed |
| careful(adjective, keen, alert, restless, cautious) |
| cautious(adjective, keen, alert, careful, attentive) |
| insomniac(adjective, alert, restless) |
| on the alert(expression, adjective, idiom, care, alert) |
| sharp(adjective, keen, bright, anxious, alert) |