- Definitions|2
- Thesaurus|651
- Abbreviations|0
| diabolic(adjective, evil, vile, wicked, fiendish) | |
| devilish(adjective, wicked) | |
| infernal(adjective, evil, vile, wicked, fiendish) | |
| satanic(adjective, evil, vile, wicked, fiendish) | |
| fiendish(adjective, evil, vile, wicked, demonic) | |
| demonic(adjective, evil, vile, wicked, execrable) | |
| demoniac(adjective, evil, vile, wicked, execrable) | |
| diabolical(adjective, wicked, demonic) | |
| evil | |
| hellish | |
| wicked | |
| bad(adjective, wicked, demonic, diabolical) | |
| iniquitous(adjective, wicked, execrable, demonic, diabolical) | |
| cacodemonic | |
| ghoulish | |
| malevolent | |
| mephistophelean | |
| sinister | |
| villainous(adjective, evil, vile, wicked, execrable) | |
| damnable(adjective, evil, vile, wicked, execrable) |
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| APA | Smart Define. (2013). mephistophelian thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/mephistophelian/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "mephistophelian thesaurus" https://smartdefine.org/mephistophelian/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2013, mephistophelian thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/mephistophelian/thesaurus/synonyms>. |
| MLA | Smart Define. "mephistophelian thesaurus" 27 June 2013. Web. 22 September 2026. <https://smartdefine.org/mephistophelian/thesaurus/synonyms> |