| unenterprising | |
| unprecipitate | |
| unsleeping(adjective, keen, anxious, alert, careful) | |
| up(adjective, set, ready, qualified, willing) | |
| up and about(expression, adjective, idiom, conscious, wide-awake) | |
| up on(expression, adjective, set, ready, qualified) | |
| waiting on(expression, keen, anxious, alert, careful) | |
| wakeful(adjective, keen, anxious, alert, careful) | |
| willing(adjective, set, ready, qualified, able) | |
| wise(sharp, bright, lively, alert, aware) | |
| with eyes peeled(expression, adjective, idiom, keen, anxious) | |
| with it(expression, sharp, bright, lively, alert) | |
| with open eyes(expression, idiom) | |
| with weather eye open(expression, idiom, keen, alert, careful) | |
| alerter | |
| alerts | |
| averting(adjective, defensive) | |
| awakened(conscious, wide-awake, wakeful) | |
| calculating(cautious, suspicious, watchful) | |
| checking(adjective, defensive) |
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| APA | Smart Define. (2015). on guard thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/on_guard/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "on guard thesaurus" https://smartdefine.org/on_guard/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, on guard thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/on_guard/thesaurus/synonyms>. |
| MLA | Smart Define. "on guard thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/on_guard/thesaurus/synonyms> |