| astute(adjective, understanding, keen, sharp, smart) |
| intent(adjective, feature, characteristic, strong, intense) |
| prudent(adjective, care, careful, thoughtful, sober) |
| wakeful(adjective, keen, sharp, care, careful) |
| on the ball(expression, adjective, idiom, adverb, keen) |
| advise(verb, order, give, declare, report) |
| animated(adjective, strong, moving, keen, smart) |
| on guard(expression, adjective, idiom, adverb, keen) |
| spry(adjective, activity, good, clear, moving) |
| wise(verb, adjective, understanding, keen, sharp) |
| flag(noun, verb, sign, indicate, advise) |
| nimble(adjective, keen, sharp, smart, bright) |
| overprotective(adjective, careful, attentive, protective) |
| spirited(adjective, strong, moving, keen, sharp) |
| swift(adjective, activity, keen, sharp, energetic) |
| acute(adjective, understanding, strong, keen, sharp) |
| admonish(verb, order, tell, prepare, prompt) |
| guarded(adjective, adverb, keen, care, sensible) |
| vigorous(adjective, good, clear, moving, pleasant) |
| vivacious(adjective, strong, keen, sharp, smart) |