33 entries under noun topic. ×
| spy(person, plant, watch, operative) | |
| agent(plant, spy, operative, informer) | |
| secret agent(expression, plant, agent, spy) | |
| double agent(expression, plant, agent, spy) | |
| detective(plant, watch, agent, spy) | |
| emissary(plant, watch, agent, spy) | |
| espionage agent(expression, plant, agent, operative) | |
| foreign agent(expression, plant, agent, operative) | |
| informer(plant, agent, spy, operative) | |
| inside agent(expression, plant, agent, operative) | |
| intelligence agent | |
| intelligencer(plant, agent, spy, operative) | |
| investigator(plant, agent, operative, informer) | |
| lookout(plant, watch, agent, spy) | |
| mole(plant, watch, agent, spy) | |
| observer(plant, agent, operative, informer) | |
| operative(plant, agent, spy, mole) | |
| patrol(plant, watch, agent, spy) | |
| picket(plant, watch, agent, spy) | |
| plant(agent, spy, operative, informer) |
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| APA | Smart Define. (2015). undercover agent thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/undercover_agent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "undercover agent thesaurus" https://smartdefine.org/undercover_agent/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, undercover agent thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/undercover_agent/thesaurus/synonyms>. |
| MLA | Smart Define. "undercover agent thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/undercover_agent/thesaurus/synonyms> |