| detestable | |
| disserviceable | |
| envenomed | |
| excruciating(adjective, endured) | |
| execrable | |
| extreme(adjective, endured) | |
| fulsome | |
| grewsome(adjective, endured) | |
| grisly(adjective, endured) | |
| harrowing(adjective, endured) | |
| harsh(adjective, endured) | |
| horrifying(adjective, endured) | |
| infected(adjective, dirty, corrupt, disgusting, unhealthy) | |
| infectious(adjective, catching, spreading) | |
| inimical(adjective, negative, antagonistic, contrary, harmful) | |
| insufferable(adjective, endured) | |
| insupportable(adjective, endured) | |
| intense(adjective, endured) | |
| intolerable(adjective, endured) | |
| lousy(adjective, bad, offensive, unpleasant, foul) |
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| APA | Smart Define. (2015). noxious thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/noxious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "noxious thesaurus" https://smartdefine.org/noxious/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, noxious thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/noxious/thesaurus/synonyms>. |
| MLA | Smart Define. "noxious thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/noxious/thesaurus/synonyms> |