9
sleuth(noun, agent, spy, informer, gumshoe)
8
private investigator(noun, expression, agent, spy, informer)
6
detective(noun, investigator)
6
dick(noun, agent, eye, spy, informer)
6
operative
6
private detective(noun, private)
6
shamus(noun, agent, spy, informer, reporter)
5
snoop(noun, agent, spy, informer, reporter)
5
gumshoe(noun, agent, eye, spy, hound)
4
PI
4
investigator(noun, person)
4
tec
3
P.I.(noun, detective)
3
eye(agent, spy, informer, reporter, gumshoe)
3
peeper(noun, agent, spy, informer, reporter)
3
sherlock
2
agent(noun, spy, hound, informer, reporter)
2
beagle
2
cop(noun, agent, spy, informer, reporter)
2
flatfoot(agent, eye, spy, informer, reporter)
11 years ago|890 views|share |citing 
APASmart Define. (2015). private eye thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/private_eye/thesaurus/synonyms
ChicagoSmart Define. 2015. "private eye thesaurus" https://smartdefine.org/private_eye/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, private eye thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/private_eye/thesaurus/synonyms>.
MLASmart Define. "private eye thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/private_eye/thesaurus/synonyms>