79 entries under foul topic. ×

29
taint(noun, verb, activity, ruin, disease)
25
contaminate(verb, activity, harm, clean)
20
pollute(verb, activity, hurt, ruin, harm)
19
corrupt(verb, adjective, activity, action, act)
14
vitiate(verb, activity, action, act, information)
10
dirty(verb, adjective, bad, hurt, harm)
10
poisonous(adjective, help, bad, evil, offensive)
10
spoil(verb, hurt, information, influence, harm)
8
pervert(verb, action, act, ruin, harm)
7
defile(verb, clean, corrupt, stain)
7
befoul(verb, soil, pollute, contaminate)
7
deprave(verb, action, act, hurt, ruin)
7
debauch(verb, action, act, ruin, harm)
6
harm(verb, hurt, information, damage, influence)
5
alloy(noun, action, thing, deterioration)
4
desecrate(verb, soil, pollute, contaminate)
4
injure(verb, information, influence, harm, kill)
4
mephitic(adjective, help, bad, evil, offensive)
3
debase(verb, action, act, hurt, ruin)
3
stain(verb, hurt, ruin, harm, kill)
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APASmart Define. (2016). poison thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/poison/thesaurus/synonyms
ChicagoSmart Define. 2016. "poison thesaurus" https://smartdefine.org/poison/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, poison thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/poison/thesaurus/synonyms>.
MLASmart Define. "poison thesaurus" 19 February 2016. Web. 28 September 2026. <https://smartdefine.org/poison/thesaurus/synonyms>