27 entries under infiltrator topic. ×
| sleeper(noun, plant, agent, operative, informer) | |
| sleuth(noun, plant, agent, spy, operative) | |
| snoop(noun, plant, agent, spy, operative) | |
| spook(noun, plant, agent, operative, informer) | |
| spotter(noun, plant, watch, guard, agent) | |
| undercover agent(noun, expression, plant, agent, operative) | |
| agent(noun, plant, operative, informer, mole) |
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| APA | Smart Define. (2016). observer thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/observer/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "observer thesaurus" https://smartdefine.org/observer/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, observer thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/observer/thesaurus/synonyms>. |
| MLA | Smart Define. "observer thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/observer/thesaurus/synonyms> |