9 entries under expression topic. ×
| double agent(noun, plant, agent, operative) | |
| espionage agent(noun, plant, agent, operative) | |
| foreign agent(noun, plant, agent, operative) | |
| inside agent(noun, plant, agent, operative) | |
| secret agent(noun, plant, agent, operative) | |
| secret service(noun, plant, agent, operative) | |
| undercover agent(noun, plant, agent, operative) | |
| duty officer | |
| passer by(verb, phrasal verb) |
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| APA | Smart Define. (2016). observer thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/observer/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "observer thesaurus" https://smartdefine.org/observer/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, observer thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/observer/thesaurus/synonyms>. |
| MLA | Smart Define. "observer thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/observer/thesaurus/synonyms> |