147 entries under vicious topic. ×

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degenerate(adjective, evil, nasty, harsh)
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dire(adjective, unpleasant, terrible, painful)
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displeasing(adjective, unpleasant, painful, distressing)
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distasteful(adjective, unpleasant, painful, distressing)
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disturbing(adjective, unpleasant, painful, distressing)
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dog eat dog(expression, adjective, idiom, fierce)
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every person for themselves(expression, adjective, idiom, fierce)
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feller(violent, savage, barbaric)
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galling(adjective, severe, harsh, unpleasant, heavy)
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grievous(adjective, unpleasant, terrible, painful)
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heartbreaking(adjective, unpleasant, painful, distressing)
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impolite(adjective, cruel, fierce, pitiless)
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intemperate(adjective, unpleasant, painful, reckless)
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ironfisted(adjective, mean, harsh, cruel)
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killer(adjective, mean, harsh, cruel)
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pernicious(adjective, evil, nasty, harsh)
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provoking(adjective, unpleasant, painful, distressing)
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ravenous(adjective, violent, cruel, fierce)
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uncivil(adjective, rough, cruel, fierce)
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unmannerly(adjective, cruel, fierce, pitiless)
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APASmart Define. (2016). merciless thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms
ChicagoSmart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, merciless thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>.
MLASmart Define. "merciless thesaurus" 31 March 2016. Web. 30 September 2026. <https://smartdefine.org/merciless/thesaurus/synonyms>