- Definitions|2
- Thesaurus|345
- Abbreviations|0
| seeker | |
| sifter | |
| sleeper(noun, plant, agent, operative, informer) | |
| snooper(noun, person) | |
| spotter(noun, plant, agent, operative, mole) | |
| store detective | |
| supervisor | |
| surveyor(noun, person, search, first) | |
| treasury agent | |
| undercover agent(noun, expression, plant, agent, operative) | |
| ventilator | |
| visitator | |
| visitor | |
| fed | |
| mole(noun, plant, agent, operative, informer) | |
| narc | |
| plant(noun, agent, operative, informer, mole) | |
| spook(noun, plant, agent, operative, informer) | |
| CID man | |
| Sherlock Holmes(noun, person) |
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| APA | Smart Define. (2015). investigator thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/investigator/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "investigator thesaurus" https://smartdefine.org/investigator/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, investigator thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/investigator/thesaurus/synonyms>. |
| MLA | Smart Define. "investigator thesaurus" 17 December 2015. Web. 29 September 2026. <https://smartdefine.org/investigator/thesaurus/synonyms> |