5
perpetrator
2
celebrate
2
explorer
2
insidious
1
keep track(verb, detect, scout, sleuth, espy)
1
seeing as
1
servile agent
1
snoop(noun, verb, investigate)
1
test(noun, verb, investigate)
0
able
0
acknowledge
0
acute
0
adroit
0
advanced
0
advanced guard
0
adventure film
0
advertisement
0
airline
0
amicus curiae
0
analysis(noun, investigate)
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APASmart Define. (2016). spy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/spy/thesaurus/related
ChicagoSmart Define. 2016. "spy thesaurus" https://smartdefine.org/spy/thesaurus/related (accessed September 24, 2026).
HarvardSmart Define 2016, spy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/spy/thesaurus/related>.
MLASmart Define. "spy thesaurus" 10 February 2016. Web. 24 September 2026. <https://smartdefine.org/spy/thesaurus/related>