- Definitions|2
- Thesaurus|818
- Abbreviations|0
134 entries under noun topic. ×
| espionage agent(expression, plant, agent, operative) | |
| ghoul(spirit, ghost, phantom) | |
| hallucination(spirit, dream, revelation, delusion) | |
| hobgoblin | |
| illusion(spirit, dream, revelation, delusion) | |
| informer(plant, agent, operative, mole) | |
| inside agent(expression, plant, agent, operative) | |
| intelligencer(plant, agent, operative, informer) | |
| investigator(plant, agent, operative, informer) | |
| lookout(plant, agent, operative, informer) | |
| looney | |
| observer(plant, agent, operative, informer) | |
| patrol(plant, agent, operative, informer) | |
| picket(plant, agent, operative, informer) | |
| plant(agent, operative, informer, mole) | |
| scout(plant, agent, operative, informer) | |
| secret service(expression, plant, agent, operative) | |
| sleeper(plant, agent, operative, informer) | |
| sleuth(plant, agent, spy, operative) | |
| snoop(plant, agent, spy, operative) |
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| APA | Smart Define. (2015). spook thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/spook/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spook thesaurus" https://smartdefine.org/spook/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, spook thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/spook/thesaurus/synonyms>. |
| MLA | Smart Define. "spook thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/spook/thesaurus/synonyms> |