| lurid(adjective, endured) | |
| macabre(adjective, endured) | |
| maleficent | |
| moldy(adjective, rank, corrupt, foul, disgusting) | |
| monstrous(adjective, endured) | |
| morbific | |
| mortal(adjective, bad, evil, harmful, dangerous) | |
| nightmarish(adjective, endured) | |
| piercing(adjective, endured) | |
| stale(adjective, rank, corrupt, foul, disgusting) | |
| tainted(adjective, rank, corrupt, foul, disgusting) | |
| tormenting(adjective, endured) | |
| torturous(adjective, endured) | |
| unacceptable(adjective, endured) | |
| unbearable(adjective, endured) | |
| unendurable(adjective, endured) | |
| unfortunate(adjective, endured) | |
| unpalatable | |
| unpleasant(adjective, mean, nasty, harsh, offensive) | |
| unsavoury |
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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> |