Guard
Guard noun - A person or group that watches over someone or something.
Undercover agent and guard are semantically related. In some cases you can use "Undercover agent" instead a noun "Guard".
Undercover agent
Undercover agent noun - (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors.
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Synonyms for Undercover agent
Guard and undercover agent are semantically related. Sometimes you can use "Guard" instead a noun phrase "Undercover agent".
Cite this Source
Undercover agent and Guard. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/guard/undercover_agent
Guard & Undercover agent. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/guard/undercover_agent>.
Undercover agent or Guard. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/guard/undercover_agent.
Google Ngram Viewer shows how "guard" and "undercover agent" have occurred on timeline