Synonyms|394Antonyms|4|Broader|31Narrower|8Related|173

25 entries under operative topic. ×

1
agent(noun, plant, informer, mole)
1
detective(noun, plant, agent, informer)
1
double agent(noun, expression, plant, agent)
1
emissary(noun, plant, agent, mole)
1
espionage agent(noun, expression, plant, agent)
1
foreign agent(noun, expression, plant, agent)
1
informer(noun, plant, agent, mole)
1
inside agent(noun, expression, plant, agent)
1
intelligencer(noun, plant, agent, spy)
1
investigator(noun, plant, agent, informer)
1
lookout(noun, plant, agent, informer)
1
mole(noun, plant, agent, informer)
1
observer(noun, plant, agent, informer)
1
patrol(noun, plant, agent, informer)
1
picket(noun, plant, agent, informer)
1
plant(noun, agent, informer, mole)
1
scout(noun, plant, agent, informer)
1
secret agent(noun, expression, plant, agent)
1
secret service(noun, expression, plant, agent)
1
sleuth(noun, plant, agent, informer)
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APASmart Define. (2015). sleeper thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sleeper/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleeper thesaurus" https://smartdefine.org/sleeper/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sleeper thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sleeper/thesaurus/synonyms>.
MLASmart Define. "sleeper thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/sleeper/thesaurus/synonyms>