| pressing(adjective, dangerous) | |
| scatheful | |
| scatological(adjective, unclean) | |
| scruffy(adjective, unclean) | |
| serious(adjective, dangerous) | |
| slaughterous(adjective, harmful, injurious, damaging, deadly) | |
| sloppy(adjective, unclean) | |
| slovenly(adjective, unclean) | |
| smutty(adjective, unclean) | |
| squalid(adjective, unclean) | |
| suicidal(adjective, violent, cruel, harmful, injurious) | |
| systemic | |
| teratogenic | |
| terminal | |
| terrible(adjective, dangerous) | |
| terrifying(adjective, dangerous) | |
| threatening(adjective, dangerous) | |
| toxicology | |
| treacherous(adjective, dangerous) | |
| unhygenic(adjective, unclean) |
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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> |