| lively(adjective, good, clear, strong, moving) |
| smart(adjective, activity, understanding, sharp, ability) |
| regardful(adjective, feature, characteristic, detail, attention) |
| warning(noun, sign, notice, cry, caution) |
| bright(adjective, good, clear, open, moving) |
| brisk(adjective, moving, pleasant, keen, sharp) |
| agile(adjective, keen, sharp, smart, bright) |
| mindful(adjective, understanding, keen, sensible, certain) |
| perceptive(adjective, understanding, strong, open, keen) |
| warn(verb, give, declare, report, tell) |
| prompt(noun, verb, adjective, activity, fast) |
| alive(adjective, adverb, open, keen, sharp) |
| forewarn(verb, order, tell, prepare, prompt) |
| fresh(adjective, energetic, person, energy, keen) |
| open-eyed(adjective, feature, characteristic, keen, sharp) |
| ready(adjective, activity, open, keen, sharp) |
| notify(verb, order, report, tell, prepare) |
| on the lookout(expression, adjective, idiom, care, lively) |
| quick-witted(adjective, strong, keen, sharp, ability) |
| siren(noun, caution, signal, alarm, warning) |