surveillance Synonyms

safety measures inspection heedfulness watchfulness watching watch vigilance vigil view track tailing surveyance survey supervisory bugging vigilantism wiretap close observation close watch peeled eye undercover work eyes wiretapping voyeurism stakeout secret service monitoring information gathering camcorder look-over supervision supervising superintendence eye examination espionage espial eavesdropping direction control charge cautiousness caution care attention ambushment guard heed intelligence spying