| Mayday(noun, information, sign, notice, alert) |
| SOS(noun, information, sign, notice, alert) |
| active(sharp, bright, lively, alert, aware) |
| admonition(information, sign, notice, alert, caution) |
| advice(information, sign, notice, alert, hint) |
| alarm(information, sign, notice, alert, caution) |
| alert(adjective, sharp, sign, notice, bright) |
| all ears(expression, sharp, bright, lively, alert) |
| attentive(sharp, bright, lively, alert, aware) |
| augury(information, sign, notice, alert, hint) |
| be alert(verb, see, mind, notice, spot) |
| be careful(verb, see, mind, notice, spot) |
| be on guard(verb, see, mind, notice, spot) |
| be wary(verb, mind, notice, spot, avoid) |
| beware(verb, mind, notice, spot, avoid) |
| bright(sharp, lively, active, alert, aware) |
| cagey(sharp, bright, lively, active, alert) |
| careful(sharp, bright, lively, alert, aware) |
| check out(verb, expression, phrasal verb, mind, notice) |
| circumspect(sharp, bright, lively, alert, attentive) |