| threat(noun, sign, notice, alert, hint) |
| tip(noun, information, sign, notice, alert) |
| tip-off(noun, sign, notice, alert, hint) |
| tip off(noun, expression, alert, cry, caution) |
| tocsin(noun, sign, alert, caution, signal) |
| token(noun, sign, notice, alert, signal) |
| warning(noun, notice, alert, cry, caution) |
| warning |
| warning signal(noun, alert, alarm, flare) |
| watch-it(noun, information, sign, notice, alert) |
| wink(noun, sign, notice, alert, caution) |
| word(noun, sign, notice, alert, hint) |
| word to the wise(noun, expression, idiom, sign, notice) |
| May Day(expression, idiom) |
| aid |
| alarm bell(expression, warning, bell, siren) |
| assistance |
| bedight |
| bell(noun, alert, caution, signal, warning) |
| blast(noun, alert, caution, signal, warning) |