| observant(adjective, keen, alert, careful, restless) |
| slumberless(adjective, awareness) |
| tossing and turning(expression, adjective, idiom, unsettled, restless) |
| unquiet(adjective, anxious, unsettled, restless, uneasy) |
| alive |
| anxious(adjective, keen, alert, careful, unsettled) |
| bustling(adjective, anxious, unsettled, restless, uneasy) |
| cautious(adjective, keen, alert, careful, attentive) |
| guarded(keen, anxious, alert, careful, cautious) |
| insomnia |
| keen(anxious, alert, careful, cautious, attentive) |
| on guard(expression, keen, anxious, alert, careful) |
| on the alert(expression, idiom, alert, careful, restless) |
| on the ball(expression, idiom, keen, alert, careful) |
| on the job(expression, idiom, keen, alert, careful) |
| on the lookout(expression, idiom, keen, alert, careful) |
| open-eyed(keen, anxious, alert, careful, cautious) |
| sharp(keen, anxious, alert, careful, attentive) |
| waking |
| acute(keen, anxious, alert, careful, cautious) |