| signal(noun, action, act, movement, mark) |
| gesture(noun, action, act, movement, communication) |
| sign(noun, action, act, movement, mark) |
| gesticulation(noun, action, act, movement, sign) |
| motion(noun, action, movement, sign, express) |
| alarm(noun, sign, device, warning, cue) |
| indication(noun, action, mark, light, sign) |
| tip(alert, caution, signal, warning, bell) |
| warning signal(noun, expression, alert, warning) |
| alert(noun, sign, caution, signal, alarm) |
| beacon(mark, light, sign, indication, alarm) |
| bell(mark, light, sign, alert, cry) |
| nod(noun, action, mark, light, sign) |
| symptom(mark, light, sign, indication, evidence) |
| warning(mark, light, sign, alert, cry) |
| wink(noun, action, mark, light, sign) |
| Mayday(sign, alert, caution, signal, alarm) |
| SOS(sign, alert, cry, caution, signal) |
| act(noun, action, movement, sign, signal) |
| action(noun, act, movement, sign, signal) |