| Main Entry: | |
| Part of Speech: | noun |
| Definition: | warning |
| Synonyms: | Mayday, SOS, admonition, alarm, flap, high sign, sign, signal, siren, tip off, wink |
| Main Entry: | beacon |
| Part of Speech: | noun |
| Definition: | light used as signal, guide |
| Synonyms: | alarm, alert, balefire, beam, bonfire, flare, guidepost, heliograph, lamp, lantern, lighthouse, lodestar, pharos, radar, rocket, sign, signal fire, smoke signal, warning signal, watchtower |
| Main Entry: | notification |
| Part of Speech: | noun |
| Definition: | announcement |
| Synonyms: | advertisement, advisory, alert, bulletin, communication, communique, declaration, information, message, news, notice, proclamation, release, report, statement, warning |
| Main Entry: | scare |
| Part of Speech: | noun |
| Definition: | frightened state |
| Synonyms: | alarm, alert, fright, panic, shock, start, terror |
| Antonyms: | calmness, comfort, ease |
| Main Entry: | signal |
| Part of Speech: | noun |
| Definition: | indication; authorization |
| Synonyms: | Mayday, SOS, alarm, alert, beacon, bleep, blinker, cue, flag, flare, gesture, go-ahead, green light, high sign, indicator, mark, movement, nod, okay*, omen, sign, tocsin, token, wink |
| Main Entry: | warning |
| Part of Speech: | noun |
| Definition: | notice of possible occurrence |
| Synonyms: | Mayday, SOS, admonition, advice, alarm, alert, augury, caution, caveat, distress signal, example, exhortation, fore, foretoken, forewarning, guidance, handwriting on wall, heads up, hint, indication, information, injunction, intimation, lesson, look out, notification, omen, portent, prediction, premonition, presage, recommendation, sign, signal, suggestion, threat, tip, tip-off, token, watch-it, wink, word, word to the wise |
| Main Entry: | high sign |
| Part of Speech: | noun |
| Definition: | silent signal of warning |
| Synonyms: | alert, signal, the nod, the wink, warning signal |
| Main Entry: | tocsin |
| Part of Speech: | noun |
| Definition: | alarm |
| Synonyms: | alert, bell, horn, sign, signal, siren, warning |
| Main Entry: | alarum |
| Part of Speech: | noun |
| Definition: | alarm |
| Synonyms: | alert, bell, call to arms, signal, siren, warning, warning signal |