27 entries under infiltrator topic. ×

1
secret service(noun, expression, plant, agent, operative)
1
sleeper(noun, plant, agent, operative, informer)
1
sleuth(noun, plant, agent, operative, informer)
1
snoop(noun, plant, agent, operative, informer)
1
spook(noun, plant, agent, operative, informer)
1
undercover agent(noun, expression, plant, agent, operative)
0
operative(noun, plant, agent, mole)
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APASmart Define. (2015). watcher thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/watcher/thesaurus/synonyms
ChicagoSmart Define. 2015. "watcher thesaurus" https://smartdefine.org/watcher/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, watcher thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/watcher/thesaurus/synonyms>.
MLASmart Define. "watcher thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/watcher/thesaurus/synonyms>