12
tamper with(verb, phrasal verb, action, act, process)
11
adulterate(verb, hurt, harm, corrupt, stain)
11
subvert(verb, action, act, destroy, rebel)
11
acrimoniousness(noun, characteristics, states, phenomena)
11
balefulness(noun, action, process, effect)
11
canker(noun, verb, activity, help, ruin)
10
bad influence(noun, expression, action, process, effect)
10
blight(noun, verb, trouble, hurt, ruin)
10
cancer(noun, substance, growth, savage, death)
10
dirty(verb, adjective, bad, hurt, harm)
10
empoison(verb, phrasal verb, help, deterioration, archaism)
10
malignancy(noun, substance, death, states)
10
malignity(noun, hatred, hate, hostility, antipathy)
10
poisonous(adjective, help, bad, evil, offensive)
10
poisonous substance(noun, expression, idiom, nature, substance)
10
spoil(verb, hurt, information, influence, harm)
10
toxic(adjective, help, poisonous)
9
malice(noun, hatred, hate, spite, meanness)
9
corruption(noun, substance, pollution, taint, death)
9
drug(noun, verb, medicine, fix, treatment)
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APASmart Define. (2016). poison thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/poison/thesaurus/synonyms
ChicagoSmart Define. 2016. "poison thesaurus" https://smartdefine.org/poison/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, poison thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/poison/thesaurus/synonyms>.
MLASmart Define. "poison thesaurus" 19 February 2016. Web. 24 September 2026. <https://smartdefine.org/poison/thesaurus/synonyms>