| intelligence(noun, spying) | |
| espial(noun, surveillance, spying, snooping) | |
| spying | |
| reconnaissance(noun, inspection, inquiry, spying) | |
| surveillance(noun, intelligence, inspection, spying, snooping) | |
| undercover work(noun, expression, idiom, spy, sleeper) | |
| watching | |
| counterintelligence | |
| secret service(noun, spying) | |
| bugging(noun, spying) | |
| cloak-and-dagger work | |
| following(noun, surveillance, snooping) | |
| intelligence work | |
| looking | |
| military intelligence | |
| overview(noun, inspection) | |
| reconnoiter(noun, inspection) | |
| shadowing(noun, spying) | |
| tailing(noun, spying) | |
| voyeurism(noun, inspection, surveillance, snooping) |
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| APA | Smart Define. (2015). espionage thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/espionage/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "espionage thesaurus" https://smartdefine.org/espionage/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, espionage thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/espionage/thesaurus/synonyms>. |
| MLA | Smart Define. "espionage thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/espionage/thesaurus/synonyms> |