Synonyms for fiendish
ˈfin dɪʃfiendish

Princeton's WordNet(2.50 / 2 votes)Rate these synonyms:

1. demonic, diabolic, diabolical, fiendish, hellish, infernal, satanic, unholyadjective

   extremely evil or cruel; expressive of cruelty or befitting hell

   "something demonic in him--something that could be cruel"; "fires lit up a diabolic scene"; "diabolical sorcerers under the influence of devils"; "a fiendish despot"; "hellish torture"; "infernal instruments of war"; "satanic cruelty"; "unholy grimaces"

   Synonyms:
   blasted, mephistophelian, wicked, infernal, damned, diabolic, deuced, beastly, hellish, satanic, blamed, damn, goddam, goddamned, blessed, unhallowed, unholy, blame, god-awful, demonic, darned, diabolical, goddamn, sinful, mephistophelean, devilish

   Antonyms:
   good

Dictionary of English Synonymes(0.00 / 0 votes)Rate these synonyms:

1. fiendishadjective

   Synonyms:
   malevolent, malignant, malicious, infernal, diabolical, devilish, demoniacal, hellish, very wicked

Synonyms, Antonyms & Associated Words(0.00 / 0 votes)Rate these synonyms:

1. fiendishadjective

   Synonyms:
   diabolical, atrocious, infernal

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1. Erich Fromm:

   The lack of objectivity, as far as foreign nations are concerned, is notorious. From one day to another, another nation is made out to be utterly depraved and fiendish, while ones own nation stands for everything that is good and noble. Every action of the enemy is judged by one standardevery action of oneself by another. Even good deeds by the enemy are considered a sign of particular devilishness, meant to deceive us and the world, while our bad deeds are necessary and justified by our noble goals which they serve.