| knowing(conscious, wide-awake, wakeful) | |
| mistrustful(cautious, suspicious, watchful) | |
| obstructive(adjective, preclusive) | |
| on the stick(expression, idiom, alert, aware, clued-in) | |
| on your toes(expression, idiom, alert, aware, clued-in) | |
| organized(set, ready) | |
| playing it cool | |
| playing it safe | |
| precautional | |
| precautionary | |
| precautious | |
| preemptive | |
| preservative(adjective, defensive) | |
| preventive(adjective, defensive) | |
| protecting(adjective, defensive) | |
| protective(adjective, obstructive, defensive, overprotective, preservative) | |
| provident(cautious, suspicious, watchful) | |
| reserved | |
| safeguarding(adjective, defensive) | |
| saving(cautious, suspicious, watchful) |
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Power Thesaurus
| APA | Smart Define. (2015). on guard thesaurus. Retrieved September 28, 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 28, 2026). |
| Harvard | Smart Define 2015, on guard thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/on_guard/thesaurus/synonyms>. |
| MLA | Smart Define. "on guard thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/on_guard/thesaurus/synonyms> |