| term | Description |
|---|---|
| spy | Terms |
| spying | |
| espionage | |
| double agent | |
| undercover | |
| government spy | |
| secret agent | |
| decoy | |
| bug | |
| intelligence | |
| intelligence gathering | |
| intelligence bureau | |
| intelligence agent | |
| covert operation | |
| clandestine operation | |
| decipher | |
| code | |
| counter-intelligence | |
| counter-espionage | |
| secret weapons | |
| classified information | |
| conspiracy | |
| hidden camera | |
| case officer | |
| government secrets | |
| collaborator | |
| betrayal | |
| phone tapping | |
| mole | |
| traitor | |
| informer | |
| sleeper | |
| snooper | |
| mission | |
| briefcase | |
| top secret | |
| breach of security | |
| briefing | |
| wired | |
| wiretapping | |
| betray | Verbs and phrases |
| blow sb's cover | |
| conceal | |
| cover your tracks | |
| crack codes | |
| go undercover | |
| infiltrate | |
| keep a low profile | |
| spy on sb, spy on sth | Verbs and phrases |
| tap a phone line | |
| dead drop | |
| defector | |
| doublespeak | |
| GCHQ | |
| CIA | |
| FBI | |
| soft target | |
| hard target | |
| polygraph | |
| interrogation | |
| torture | |
| safe house | |
| sleeper cell | |
| Stockholm syndrome | |
| watch list |