2
feral
2
ferocious(adjective, animal, mean, cruel, vicious)
2
fierce(adjective, animal, mean, cruel, vicious)
2
full of hate(expression, idiom)
2
gangrenous(adjective, unhealthy)
2
ghoulish
2
grim(adjective, animal, mean, dark, violent)
2
hellish(adjective, nasty, vicious, wicked, hateful)
2
horrible(adjective, mean, vicious, spiteful)
2
horrid(mean, malicious, vindictive)
2
inauspicious(adjective, evil, nasty, cold, hostile)
2
infected(adjective, unhealthy)
2
infectious
2
infective
2
infernal
2
inhospitable(adjective, mean, nasty, cold, hostile)
2
invidious
2
killing
2
menacing(adjective, bad, evil, heavy, dangerous)
2
merciless(adjective, mean, cruel, vicious, hateful)
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APASmart Define. (2016). malignant thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/malignant/thesaurus/synonyms
ChicagoSmart Define. 2016. "malignant thesaurus" https://smartdefine.org/malignant/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, malignant thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/malignant/thesaurus/synonyms>.
MLASmart Define. "malignant thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/malignant/thesaurus/synonyms>