| concerned(adjective, thoughtful, sober, cautious, attentive) |
| defensive(adjective, alert, careful, caring, sheltered) |
| discerning(adjective, understanding, cool, reasonable, keen) |
| guardian |
| hawk-eyed |
| intelligent(adjective, cool, reasonable, sharp, bright) |
| interested(adjective, alert, intelligent, considerate, responsive) |
| lidless |
| light |
| meticulous(adjective, careful, thoughtful, sober, cautious) |
| on one's guard(expression, adjective, idiom, care, caution) |
| on the watch(expression, adjective, idiom, adverb, alert) |
| particular(adjective, thoughtful, sober, cautious, prudent) |
| perceptive(adjective, understanding, cool, sharp, bright) |
| responsible(adjective, attentive) |
| sagacious(adjective, understanding, cool, reasonable, sensible) |
| sage(adjective, understanding, cool, reasonable, sensible) |
| sensible(adjective, understanding, cool, reasonable, keen) |
| alive to(expression, adjective, understanding, keen, sensible) |
| anxious(adjective, alert, eager, careful, attentive) |