| cagey(adjective, sharp, bright, lively, careful) |
| clever(adjective, cool, sharp, bright, lively) |
| concentrating(adjective, caring, thoughtful, considerate, responsive) |
| correct(adjective, alert, attentive, watchful, scrupulous) |
| diplomatic(adjective, kind, reasonable, sensible, delicate) |
| discovering(adjective, alert, attentive, watchful, sharp-eyed) |
| duteous(adjective, attentive, compliant, submissive, docile) |
| dutiful(adjective, considerate, responsive, helpful, compliant) |
| engrossed(adjective, attentive) |
| finical(adjective, vigilant) |
| fussy(adjective, thoughtful, sober, cautious, prudent) |
| insightful(adjective, understanding, cool, keen, sharp) |
| intentive(adjective, sympathetic, alert, witting, attentive) |
| keen-eyed |
| knowing(adjective, understanding, cool, keen, sharp) |
| knowledgeable(adjective, understanding, cool, keen, sharp) |
| on the job(expression, adjective, idiom, keen, sharp) |
| particular(adjective, thoughtful, sober, cautious, prudent) |
| politic(adjective, sensitive, careful, cautious, prudent) |
| preventive(adjective, alert, careful, attentive, protective) |