104 entries under foul topic. ×
| toxic(adjective, help, heavy, unhealthy) | |
| malignant(adjective, mean, bad, evil, nasty) | |
| noxious(adjective, mean, bad, nasty, offensive) | |
| deadly(adjective, bad, offensive, disgusting) | |
| pernicious(adjective, mean, bad, evil, nasty) | |
| baneful(adjective, offensive, disgusting, unhealthy) | |
| harmful(adjective, bad, evil, offensive, cruel) | |
| dangerous(adjective, bad, offensive, violent, wild) | |
| deleterious(adjective, mean, bad, evil, nasty) | |
| nasty(adjective, mean, bad, taste, attitude) | |
| injurious(adjective, mean, bad, evil, nasty) | |
| bad(adjective, evil, nasty, offensive, violent) | |
| evil(adjective, mean, nasty, attitude, offensive) | |
| noisome(adjective, bad, taste, offensive, awful) | |
| detrimental(adjective, mean, bad, nasty, offensive) | |
| hurtful(adjective, bad, offensive, cruel) | |
| mephitic(adjective, help, bad, evil, offensive) | |
| unwholesome(adjective, offensive, disgusting, unhealthy) | |
| unhealthy(adjective, offensive, heavy, dirty) | |
| pestilential(adjective, bad, harmful, injurious) |
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| APA | Smart Define. (2015). poisonous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/poisonous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "poisonous thesaurus" https://smartdefine.org/poisonous/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, poisonous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/poisonous/thesaurus/synonyms>. |
| MLA | Smart Define. "poisonous thesaurus" 19 August 2015. Web. 29 September 2026. <https://smartdefine.org/poisonous/thesaurus/synonyms> |