| signal(noun, information, mark, light, note) |
| lighthouse(noun, light, sign, guide, flash) |
| flare(noun, light, sign, guide, flash) |
| sign(noun, information, mark, light, note) |
| light(noun, mark, note, sign, flash) |
| guide(noun, verb, show, drive, information) |
| alert(noun, light, guide, indication, alarm) |
| buoy(noun, device, alarm, marker) |
| pharos(noun, light, guide, indication) |
| lamp(noun, light, sign, guide, flash) |
| beam(noun, light, sign, guide, glow) |
| lantern(noun, light, sign, guide, flash) |
| semaphore(noun, indication, alarm) |
| alarm(noun, light, guide, alarm) |
| guidepost(noun, light, guide, indication) |
| fire |
| flame |
| marker(noun, information, influence, indication, key) |
| bell(noun, mark, light, sign, indication) |
| bonfire(noun, light, sign, fire, guide) |