34
toxin(noun, medicine, help, kill, thing)
31
virus(noun, help, disease, thing, substance)
31
venom(noun, verb, medicine, upset, trouble)
29
taint(noun, verb, activity, ruin, disease)
28
contagion(noun, help, disease, substance, taint)
27
infection(noun, disease, substance, taint, death)
25
acrimony(noun, characteristics, states, bane, toxin)
25
contaminate(verb, activity, harm, clean, foul)
25
contamination(noun, person, disease, clean, substance)
22
pollution(noun, disease, taint, contamination, infection)
20
pollute(verb, activity, hurt, ruin, harm)
20
bane(noun, substance, medicine, thing, agent)
19
corrupt(verb, adjective, activity, action, act)
17
illness(noun, disease, infection, virus, contagion)
16
embitteredness(noun, action, process, effect, characteristics)
15
envenom(verb, activity, action, upset, help)
15
infect(verb, help, hurt, harm, corrupt)
14
vitiate(verb, activity, action, act, information)
12
toxicant(noun, adjective, medicine, help, substance)
12
rancour(noun, characteristics, states, phenomena)
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APASmart Define. (2016). poison thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/poison/thesaurus/synonyms
ChicagoSmart Define. 2016. "poison thesaurus" https://smartdefine.org/poison/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, poison thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/poison/thesaurus/synonyms>.
MLASmart Define. "poison thesaurus" 19 February 2016. Web. 20 September 2026. <https://smartdefine.org/poison/thesaurus/synonyms>