possible profanity
Synonyms|532Antonyms|99|Broader|6Narrower|0Related|869
4
fiendlike(malevolence, vice)
4
foul(adjective, wicked)
4
ghostly(adjective, unusual, wonderful, marvelous, charming)
4
heartless(adjective, mean, bad, wrong, evil)
4
horrid
4
impish(adjective, wicked, demon, mischievous)
4
truculent(adjective, animal, mean, cruel, vicious)
4
unfeeling(adjective, animal, mean, cruel, vicious)
4
ungodly
4
unhallowed(adjective, evil, cruel, vile, wicked)
3
baleful
3
clairvoyant(adjective, extraordinary, unusual, wonderful, marvelous)
3
cold-hearted(adjective, bad behavior, aroused negative)
3
crazy(adjective, lunatic)
3
dark
3
emotionless(adjective, bad behavior, aroused negative)
3
evil-minded(adjective, bad behavior, aroused negative)
3
fearful(adjective, wicked)
3
flagituous(adjective, bad behavior, aroused negative)
3
frightful
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APASmart Define. (2016). fiendish thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fiendish/thesaurus/synonyms
ChicagoSmart Define. 2016. "fiendish thesaurus" https://smartdefine.org/fiendish/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, fiendish thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fiendish/thesaurus/synonyms>.
MLASmart Define. "fiendish thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/fiendish/thesaurus/synonyms>