| on the horizon(expression, adjective, idiom, imminent, forthcoming) |
| on the job(expression, idiom, keen, alert, careful) |
| on the lookout(expression, idiom, keen, alert, careful) |
| on the qui vive(expression, idiom, keen, alert, careful) |
| on toes(expression, keen, anxious, alert, careful) |
| open-eyed(keen, anxious, alert, careful, cautious) |
| portending(imminent, forthcoming, approaching, looming, awaiting) |
| proximate(imminent, forthcoming, approaching, looming, awaiting) |
| see it coming(expression, adjective, idiom, imminent, forthcoming) |
| sharp(keen, anxious, alert, careful, attentive) |
| sleepless(keen, anxious, alert, careful, cautious) |
| unsleeping(keen, anxious, alert, careful, cautious) |
| vigilant(adjective, alert, careful, attentive, watchful) |
| waiting on(expression, keen, anxious, alert, careful) |
| waiting to(expression, adjective, imminent, forthcoming, approaching) |
| wakeful(keen, anxious, alert, careful, cautious) |
| wary(keen, alert, careful, attentive, watchful) |
| wide-awake(keen, anxious, alert, careful, attentive) |
| with eyes peeled(expression, idiom, keen, alert, careful) |
| with weather eye open(expression, idiom, keen, anxious, careful) |