| sharp-sightedness |
| sleepless(adjective, keen, anxious, alert, careful) |
| sly(adjective, considerate, cautious, prudent, suspicious) |
| spirited(adjective, sharp, bright, lively, alert) |
| suspicious(adjective, anxious, alert, awkward, nervous) |
| switched on(expression, adjective, sharp, bright, lively) |
| unsleeping(adjective, keen, anxious, alert, careful) |
| unwasteful(adjective, considerate, cautious, prudent, suspicious) |
| waiting on(expression, adjective, keen, alert, careful) |
| wakeful(adjective, keen, anxious, alert, careful) |
| watchful(adjective, keen, sharp, lively, alert) |
| wired(adjective, sharp, bright, lively, alert) |
| wise(adjective, sharp, bright, lively, alert) |
| with eyes peeled(expression, adjective, idiom, keen, anxious) |
| with it(expression, adjective, sharp, bright, lively) |
| with weather eye open(expression, adjective, idiom, keen, careful) |
| accommodating(considerate, responsive, helpful) |
| assiduous(considerate, responsive, helpful) |
| calculating(adjective, considerate, cautious, prudent, suspicious) |
| canny(adjective, considerate, cautious, prudent, suspicious) |