27
venomous(adjective, help, mean, bad, evil)
23
bitter(adjective, mean, love, evil, nasty)
23
poisonous(adjective, help, mean, bad, nasty)
20
malignant(adjective, help, mean, bad, nasty)
20
deadly(adjective, help, strange, horrible, horror)
19
acrimonious(adjective, hard, love, severe, nasty)
19
vicious(adjective, mean, bad, evil, nasty)
18
caustic(adjective, severe, nasty, harsh, intelligent)
17
malicious(adjective, mean, bad, evil, nasty)
17
spiteful(adjective, mean, evil, nasty, harsh)
16
acid(noun, adjective)
15
toxic(adjective, help, unhealthy, tainted, noxious)
14
acerbic
14
lethal(adjective, rotten, harmful, deadly, fatal)
14
pernicious(adjective, help, mean, bad, evil)
14
scathing(adjective, strange, horrible, hostile, horror)
13
biting(adjective, severe, nasty, harsh, intelligent)
13
cutting(adjective, hostile)
13
fatal(adjective, unhealthy, deadly, noxious, unwholesome)
13
harsh(adjective, severe, evil, nasty, vicious)
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APASmart Define. (2015). virulent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/virulent/thesaurus/synonyms
ChicagoSmart Define. 2015. "virulent thesaurus" https://smartdefine.org/virulent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, virulent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/virulent/thesaurus/synonyms>.
MLASmart Define. "virulent thesaurus" 3 August 2015. Web. 22 September 2026. <https://smartdefine.org/virulent/thesaurus/synonyms>