| espier | |
| espies | |
| espying | |
| exam | |
| examination(noun, investigate) | |
| examine(verb, investigate) | |
| exploration(noun, investigate) | |
| explore(verb, investigate) | |
| exquisite | |
| faintly | |
| fairly | |
| feeble | |
| feel(verb, investigate) | |
| feeler(noun, investigate) | |
| ferret | |
| fieldworker | |
| fighter | |
| fighter-bomber | |
| find | |
| find out |
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Power Thesaurus
| APA | Smart Define. (2016). spy thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/spy/thesaurus/related |
| Chicago | Smart Define. 2016. "spy thesaurus" https://smartdefine.org/spy/thesaurus/related (accessed September 27, 2026). |
| Harvard | Smart Define 2016, spy thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/spy/thesaurus/related>. |
| MLA | Smart Define. "spy thesaurus" 10 February 2016. Web. 27 September 2026. <https://smartdefine.org/spy/thesaurus/related> |