- Definitions|1
- Thesaurus|139
- Abbreviations|0
| atrociously(adverb, terrible, in awful way) | |
| demoniacally(adverb, terrible, in awful way) | |
| devilishly(adverb, satanically) | |
| ferociously(adverb, terrible, in awful way) | |
| fiendishly(adverb, extremely, horribly, hellishly, satanically) | |
| hellishly(adverb, extremely, horribly, hellishly) | |
| infernally(adverb, horribly, hellishly) | |
| brutally(adverb, terrible, in awful way) | |
| satanically(adverb, satanically) | |
| barbarically(adverb, terrible, in awful way) | |
| barbarously(adverb, terrible, in awful way) | |
| brutishly(adverb, terrible, in awful way) | |
| cold-fistedly(adverb, terrible, in awful way) | |
| cruelly(adverb, in awful way) | |
| ferally(adverb, terrible, in awful way) | |
| fiercely(adverb, terrible, in awful way) | |
| In a cruelhearted way(adverb, terrible, in awful way) | |
| demonically | |
| deucedly | |
| abysmally(adverb, hellishly) |
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| APA | Smart Define. (2016). diabolically thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/diabolically/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "diabolically thesaurus" https://smartdefine.org/diabolically/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, diabolically thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/diabolically/thesaurus/synonyms>. |
| MLA | Smart Define. "diabolically thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/diabolically/thesaurus/synonyms> |