3
secret service
3
tailing(noun, verb, scrutiny, investigation, shadowing)
3
witnessing(verb, seeing)
2
bugging(bug, scrutiny, investigation, monitor, tap)
2
contracting
2
descrying
2
discovering
2
espying
2
find
2
following(bug, scrutiny, investigation, monitor, tap)
2
inspecting(verb, seeing)
2
intelligence work
2
lookout(bug, scrutiny, investigation, monitor, tap)
2
maculation
2
observation(scrutiny, investigation, shadowing)
2
peeping(verb, adjective)
2
peering(verb, seeing)
2
scouting
2
sensing
2
spy
11 years ago|3.6k views|share |citing 
APASmart Define. (2015). spying thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/spying/thesaurus/synonyms
ChicagoSmart Define. 2015. "spying thesaurus" https://smartdefine.org/spying/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, spying thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/spying/thesaurus/synonyms>.
MLASmart Define. "spying thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/spying/thesaurus/synonyms>