- Definitions|1
- Thesaurus|132
- Abbreviations|0
43 entries under adverb topic. ×
| diabolically(extremely, horribly, hellishly, satanically) | |
| cruelly | |
| devilishly | |
| hellishly(extremely, horribly, pitilessly) | |
| satanically | |
| atrociously | |
| badly | |
| brutally | |
| deucedly | |
| evilly | |
| ferociously | |
| infernally(horribly, hellishly) | |
| madly | |
| mercilessly | |
| barbarically | |
| bloodthirstily | |
| crazily | |
| demoniacally | |
| demonically | |
| everlastingly |
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| APA | Smart Define. (2015). fiendishly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fiendishly/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "fiendishly thesaurus" https://smartdefine.org/fiendishly/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, fiendishly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fiendishly/thesaurus/synonyms>. |
| MLA | Smart Define. "fiendishly thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/fiendishly/thesaurus/synonyms> |