104 entries under foul topic. ×
| unholy(adjective, bad, offensive, revolting) | |
| unsound(offensive, unhealthy, harmful, injurious) | |
| vulgar(adjective, bad, offensive, revolting) | |
| whiffy(adjective, stinking, smelly, foul-smelling) |
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Poisonous on
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| APA | Smart Define. (2015). poisonous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/poisonous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "poisonous thesaurus" https://smartdefine.org/poisonous/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, poisonous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/poisonous/thesaurus/synonyms>. |
| MLA | Smart Define. "poisonous thesaurus" 19 August 2015. Web. 30 September 2026. <https://smartdefine.org/poisonous/thesaurus/synonyms> |