| intentive(correct, alert, intelligent, perceptive, attentive) |
| interested(correct, alert, intelligent, perceptive, attentive) |
| keen(alert, intelligent, perceptive, attentive, watchful) |
| mindful(correct, alert, intelligent, perceptive, attentive) |
| not missing a trick(expression, idiom, correct, alert, intelligent) |
| obedient(correct, alert, intelligent, perceptive, attentive) |
| observative(correct, alert, intelligent, perceptive, attentive) |
| observing |
| on the ball(expression, idiom, alert, intelligent, attentive) |
| penetrating(correct, alert, intelligent, perceptive, attentive) |
| perceptive(alert, intelligent, attentive, watchful, discerning) |
| questioning(correct, alert, intelligent, perceptive, attentive) |
| quick(alert, intelligent, perceptive, attentive, watchful) |
| realizing(verb, discovering) |
| regardful(correct, alert, intelligent, attentive, watchful) |
| searching(correct, alert, intelligent, perceptive, attentive) |
| sensitive(correct, alert, intelligent, perceptive, attentive) |
| sharp(alert, intelligent, perceptive, attentive, watchful) |
| sharp-eyed(correct, alert, intelligent, perceptive, attentive) |
| solving(verb, discovering) |