1
plant(noun, agent, operative, informer, mole)
1
police detective
1
police officer(noun, expression, agent, spy, informer)
1
prosecutor(agent, spy, hound, informer, reporter)
1
pry(noun, verb, examine, case, discover)
1
quest(verb, pursue)
1
rat
1
recon(verb, examine, case, discover, watch)
1
reconnoiter(verb, examine, case, discover, watch)
1
reporter(agent, spy, informer, gumshoe, investigator)
1
revenuer
1
reviewer
1
roper(agent, spy, informer, reporter, gumshoe)
1
saluki
1
scrutinize(verb, examine, discover, watch, pry)
1
secret agent(noun, expression, plant, agent, operative)
1
secret service(noun, expression, plant, agent, operative)
1
secretly follow(verb, expression, examine, case, discover)
1
seek(verb, pursue)
1
sense
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APASmart Define. (2015). sleuth thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sleuth/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleuth thesaurus" https://smartdefine.org/sleuth/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sleuth thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sleuth/thesaurus/synonyms>.
MLASmart Define. "sleuth thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/sleuth/thesaurus/synonyms>