- Definitions|2
- Thesaurus|117
- Abbreviations|0
| enigma | |
| secret | |
| mystery | |
| brain-teaser | |
| riddle | |
| closed book | |
| whodunit | |
| mystery story |
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| APA | Smart Define. (2016). arcanum thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/arcanum/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arcanum thesaurus" https://smartdefine.org/arcanum/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2016, arcanum thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/arcanum/thesaurus/synonyms>. |
| MLA | Smart Define. "arcanum thesaurus" 1 April 2016. Web. 30 September 2026. <https://smartdefine.org/arcanum/thesaurus/synonyms> |
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