7 entries under fiendish topic. ×

15
diabolic(adjective, evil, vile, wicked)
10
infernal(adjective, evil, vile, wicked)
10
satanic(adjective, evil, vile, wicked)
8
demonic(adjective, evil, vile, wicked, execrable)
1
serpentine(adjective, evil, vile, wicked)
1
unhallowed(adjective, evil, vile, wicked)
0
atrocious(adjective, evil, vile, wicked)
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APASmart Define. (2013). mephistophelian thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/mephistophelian/thesaurus/synonyms
ChicagoSmart Define. 2013. "mephistophelian thesaurus" https://smartdefine.org/mephistophelian/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2013, mephistophelian thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/mephistophelian/thesaurus/synonyms>.
MLASmart Define. "mephistophelian thesaurus" 27 June 2013. Web. 1 October 2026. <https://smartdefine.org/mephistophelian/thesaurus/synonyms>