| argus-eyed |
| concerned(adjective, upset, excited, anxious, alert) |
| considerate(adjective, careful, thoughtful, cautious, prudent) |
| eagle-eyed(adjective, alert, intelligent, attentive, sharp-eyed) |
| expectant(adjective, attention, anticipating) |
| judicious(adjective, understanding, cool, reasonable, smart) |
| keen(adjective, understanding, sensible, certain, alert) |
| on the alert(expression, adjective, idiom, care, alert) |
| prepared(adjective, alert, eager, aware, attentive) |
| preventive(adjective, alert, careful, attentive, opposing) |
| protective(adjective, caring, cautious, wary, opposing) |
| provident(adjective, mean, careful, practical, prudent) |
| scrupulous(adjective, alert, careful, attentive, prudent) |
| suspicious(adjective, restrained, alert, shy, hesitant) |
| defensive(adjective, alert, careful, caring, attentive) |
| diligent(adjective, attentive, vigilant) |
| gingerly(adjective, restrained, careful, cautious, prudent) |
| lidless |
| on the watch(expression, adjective, idiom, adverb, attention) |
| politic(adjective, careful, thoughtful, cautious, prudent) |