cryptonyms
/ˈkrɪptəˌnɪmz/
noun
- Secret names or code names used to hide the true identity of a person, place, or thing, especially in intelligence or military operations.
- The leaked documents revealed the cryptonyms used for foreign leaders in diplomatic cables.
- The spy agency assigned cryptonyms to all its undercover agents to protect their real identities.
- During the war, military operations were referred to by cryptonyms like 'Operation Overlord'.