Double agent and Espionage agent

Double agent noun - A spy who works for two mutually antagonistic countries.

Espionage agent and double agent are semantically related. in spy for two nations topic. In some cases you can use "Espionage agent" instead a noun phrase "Double agent".

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

Double agent and espionage agent are semantically related. You can use "Double agent" instead a noun phrase "Espionage agent".