Agent
Agent noun - A person who tries secretly to obtain information for one country in the territory of another usually unfriendly country.
Usage example: an agent feeding information about enemy troop movements
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Synonyms for Agent
Undercover and agent are semantically related. In some cases you can use "Undercover" instead the word "Agent" as a noun or an adjective.
Undercover
Undercover noun - A person who tries secretly to obtain information for one country in the territory of another usually unfriendly country.
Usage example: within the city was a well-organized fifth column, and these undercovers would make themselves known as soon as the invading forces breached the city limits
Agent and undercover are semantically related. Sometimes you can use "Agent" instead a noun "Undercover".
Mutual synonyms
Both words in one sentence
- In Suburgatory, a student that Tessa assumed to be gay actually was an undercover narcotics agent.
Source: Undercover Cop Reveal - Mabuse has an undercover Interpol agent investigating international crime at a German hotel.
Source: Interpol Special Agent -
Although Martin is deliberately invoking this trope as he is an undercover(REALLY undercover) agent and needs to stand out as little as possible.
Source: Ridiculously Average Guy
Cite this Source
Undercover and Agent. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/agent/undercover
Agent & Undercover. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/agent/undercover>.
Undercover or Agent. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/agent/undercover.
Google Ngram Viewer shows how "agent" and "undercover" have occurred on timeline