| hawk-eyed | |
| heads up(expression, sharp, bright, lively, alert) | |
| hesitant | |
| hip(sharp, bright, lively, alert, attentive) | |
| hooked(adjective, alert, careful, cautious, attentive) | |
| in defense | |
| in opposition(expression, adjective, obstructive, defensive, recalcitrant) | |
| in order(expression, set, ready, qualified, willing) | |
| in readiness(expression, adjective, set, ready, qualified) | |
| in self-defense | |
| inclined(adjective, set, ready, qualified, willing) | |
| jazzed(sharp, bright, lively, alert, attentive) | |
| judicious | |
| keen(adjective, anxious, alert, careful, cautious) | |
| leaving out nothing(expression, idiom) | |
| lidless | |
| lively(sharp, bright, alert, aware, attentive) | |
| looking for(expression, keen, anxious, alert, careful) | |
| looking to(expression, keen, anxious, alert, careful) | |
| minded(adjective, set, ready, qualified, willing) |
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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> |