2
tragic
2
undesireworthy(adjective, arouse bad feelings, negative emotions)
2
unrelenting(adjective, evil, nasty, harsh, vicious)
2
vengeful(adjective, mean, evil, nasty, harsh)
2
wrackful(adjective, harmful, injurious, damaging, deadly)
1
abhorrent
1
abominable
1
annihilative(adjective, harmful, injurious, damaging, deadly)
1
balefulness
1
beastly(adjective, mean, bad, nasty, corrupt)
1
bestial(adjective, evil, nasty, harsh, vicious)
1
bitter(adjective, mean, evil, nasty, harsh)
1
black
1
blacken
1
bloodthirsty(adjective, evil, nasty, harsh, vicious)
1
brutish(adjective, evil, nasty, harsh, vicious)
1
cancerous(adjective, harmful, injurious, damaging, deadly)
1
cold-blooded(adjective, evil, nasty, harsh, vicious)
1
consumptive(adjective, harmful, injurious, damaging, deadly)
1
corrosive
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APASmart Define. (2016). pernicious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/pernicious/thesaurus/synonyms
ChicagoSmart Define. 2016. "pernicious thesaurus" https://smartdefine.org/pernicious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, pernicious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/pernicious/thesaurus/synonyms>.
MLASmart Define. "pernicious thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/pernicious/thesaurus/synonyms>