Espionage agent and Undercover work

Espionage agent noun - Someone employed to spy on another country or business competitor.

Undercover work and espionage agent are semantically related. In some cases you can use "Undercover work" instead a noun phrase "Espionage agent".

Undercover work noun - The act of keeping a secret watch for intelligence purposes.

Espionage agent and undercover work are semantically related. You can use "Espionage agent" instead a noun phrase "Undercover work".