| Mayday(noun, information, sign, notice, alert) | |
| cry(noun, alert, caution, signal, warning) | |
| tip off(noun, expression, alert, cry, caution) | |
| warning(noun, notice, alert, cry, caution) | |
| alarm bell(expression, warning, siren) | |
| whistle(noun, alert, cry, caution, signal) |
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| APA | Smart Define. (2013). sos thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sos/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "sos thesaurus" https://smartdefine.org/sos/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2013, sos thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sos/thesaurus/synonyms>. |
| MLA | Smart Define. "sos thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/sos/thesaurus/synonyms> |