| alert(adjective, feature, characteristic, understanding, keen) |
| vigilant(adjective, feature, characteristic, understanding, cool) |
| careful(adjective, upset, keen, sharp, smart) |
| observant(adjective, feature, characteristic, understanding, cool) |
| cautious(adjective, adverb, keen, smart, sensible) |
| attentive(adjective, feature, characteristic, understanding, keen) |
| heedful(adjective, feature, characteristic, sharp, detail) |
| wary(adjective, keen, sharp, smart, bright) |
| circumspect(adjective, sharp, lively, careful, practical) |
| prudent(adjective, restrained, careful, practical, cautious) |
| mindful(adjective, understanding, keen, sensible, certain) |
| guarded(adjective, keen, care, restrained, alert) |
| open-eyed(adjective, feature, characteristic, keen, sharp) |
| regardful(adjective, feature, characteristic, detail, attention) |
| wakeful(adjective, keen, sharp, bright, care) |
| aware(adjective, feature, characteristic, understanding, cool) |
| overprotective(adjective, care, attention, alert, careful) |
| on guard(expression, adjective, idiom, adverb, sharp) |
| awake(adjective, understanding, cool, reasonable, keen) |
| chary(adjective, close, mean, sensible, spare) |