- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
possible profanity
| cold(adjective, person, bad behavior, unwarmhearted, aroused negative) | |
| flagitious | |
| merciless(adjective, nasty, cruel, vicious, wicked) | |
| sadistic(adjective, cruel, perverted, diabolical) | |
| spiteful(adjective, person, wicked, bad behavior, unwarmhearted) | |
| unsympathetic(adjective, animal, person, mean, cruel) | |
| vile(adjective, wicked) | |
| depraved(adjective, evil, wicked) | |
| execrable(adjective, terrible, vicious, wicked, irritating) | |
| fierce(adjective, animal, mean, violent, wild) | |
| nefarious(adjective, bad, wrong, evil, nasty) | |
| unkind(adjective, animal, person, mean, wrong) | |
| angry(adjective, person, unwarmhearted) | |
| ferocious(adjective, animal, mean, violent, wild) | |
| immoral(adjective, wicked) | |
| inconsiderate(adjective, person, bad behavior, unwarmhearted) | |
| indecent(adjective, person, wicked, unwarmhearted) | |
| vindictive(adjective, person, wicked, unwarmhearted) | |
| abominable(adjective, wicked) | |
| bestial(adjective, animal, mean, cruel, vicious) |
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| APA | Smart Define. (2016). fiendish thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fiendish/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fiendish thesaurus" https://smartdefine.org/fiendish/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, fiendish thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fiendish/thesaurus/synonyms>. |
| MLA | Smart Define. "fiendish thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/fiendish/thesaurus/synonyms> |