28
disease(noun, health, biology, body, disorder)
25
infection(noun, health, biology, body, disorder)
19
taint(noun, disease, infection, epidemic, contagion)
18
contagion(noun, health, help, disease, substance)
18
germ(noun, health, biology, body, thing)
16
poison(noun, help, disease, substance, taint)
16
illness(noun, health, disorder, disease, organism)
15
bug(noun, biology, body, disorder, bother)
14
toxin(noun, help, disease, substance, poison)
13
contamination(noun, disease, infection, epidemic, contagion)
13
pollution(noun, disease, taint, contamination, infection)
12
venom(noun, help, disease, substance, poison)
11
microbe(noun, health, biology, body, thing)
11
ailment(noun, health, disorder, disease, collapse)
11
bane(noun, help, bother, disease, substance)
11
pest(noun, person, thing, informal, bane)
10
bacillus(noun, health, biology, body, thing)
10
microorganism(noun, health, illness, organism, sickness)
9
bacterium(noun, biology, animal, creature, body)
8
bacteria(noun, health, creature, disease, organism)
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APASmart Define. (2015). virus thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/virus/thesaurus/synonyms
ChicagoSmart Define. 2015. "virus thesaurus" https://smartdefine.org/virus/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, virus thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/virus/thesaurus/synonyms>.
MLASmart Define. "virus thesaurus" 20 November 2015. Web. 20 September 2026. <https://smartdefine.org/virus/thesaurus/synonyms>