| sentient(adjective, understanding, open, keen, sensible) | |
| strict(adjective, vigilant) | |
| threat(noun, information, sign, notice, caution) | |
| token(noun, sign, notice, indication, caution) | |
| vigilance(noun, caution) | |
| vital(adjective, adverb, good, clear, pleasant) | |
| able(adjective, smart, bright, intelligent, competent) | |
| Argus-eyed | |
| adroit(adjective, good, keen, sharp, smart) | |
| alarm bell(expression, idiom, warning, bell, siren) | |
| alerting | |
| astir(adjective, adverb, activity, moving, energetic) | |
| awaken(verb, produce, provoke, stimulate, excite) | |
| badge(noun, indication) | |
| beckon(verb, indicate) | |
| betoken(verb, indicate) | |
| buoy(noun, alarm) | |
| cagey(adjective, bright, lively, careful, cautious) | |
| close | |
| concentrated(adjective, set, determined, deep, fixed) |
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| APA | Smart Define. (2016). alert thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/alert/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, alert thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>. |
| MLA | Smart Define. "alert thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms> |