Word Study
counterintelligence
THESAURUS
counterintelligence
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, wiretappingFor further exploring for "counterintelligence" in Webster Dictionary Online