| life-threatening(adjective, dangerous) | |
| malign | |
| miasmic | |
| mischievous(injurious, damaging, destructive) | |
| offensive(adjective, unclean) | |
| pathological(adjective, unhealthy) | |
| toxiferous | |
| unclean(adjective, unclean) | |
| unhygienic(adjective, unhealthy) | |
| unsanitary(adjective, unhealthy, unclean) | |
| venom | |
| calamitous(adjective, harmful, injurious, damaging, deadly) | |
| cataclysmic(adjective, harmful, injurious, damaging, deadly) | |
| catastrophic(adjective, harmful, injurious, damaging, deadly) | |
| contaminated(adjective, unhealthy) | |
| corroding(injurious, damaging, destructive) | |
| corrupting(harmful, injurious, damaging, destructive, catching) | |
| crippling(adjective, injurious, damaging, destructive) | |
| defiled(adjective, unclean) | |
| devastating(adjective, bad, evil, wicked, harmful) |
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| APA | Smart Define. (2015). toxic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/toxic/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "toxic thesaurus" https://smartdefine.org/toxic/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, toxic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/toxic/thesaurus/synonyms>. |
| MLA | Smart Define. "toxic thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/toxic/thesaurus/synonyms> |