| Word | Definitions | Synonyms |
|---|---|---|
| counterspy | (noun) a spy who works against enemy espionage | Synonyms: mole |
| spy | (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 | Synonyms: undercover agent |
| (noun) a secret watcher; someone who secretly watches other people | - |