Exact Match:
- counterintelligence
- intelligence activities concerned with identifying and counteracting the threat to security posed by hostile intelligence organizations or by individuals engaged in espionage or sabotage or subversion or terrorism
Synonyms:
- bugging,
- cloak-and-dagger work,
- counterespionage,
- electronic surveillance,
- espial,
- espionage,
- following,
- intelligence,
- intelligence bureau,
- intelligence service,
- intelligence work,
- military intelligence,
- naval intelligence,
- observation,
- secret police,
- secret service,
- shadowing,
- spying,
- stakeout,
- surveillance,
- tailing,
- trailing,
- wiretap,
- wiretapping