espionage Synonyms

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