espionage Synonyms

spying gathering secret information intelligence activity wiretapping voyeurism snooping sleuthing secret service industrial espionage cyberespionage counterintelligence intelligence operation undercover work intelligence gathering covert op collecting politically valuable information collecting information about an enemy cloak-and-dagger work act of collecting information black operations phone tapping undercover operations undercover activities counterespionage counter-espionage black op spook shadowing reconnaissance observation looking intelligence infiltration following espial spy surveillance tailing information gathering military intelligence wiretap secret police covert operation bugging intelligence service inspection watching eavesdropping