100 entries under harmful topic. ×
| malignant(adjective, help, mean, bad, evil) | |
| lethal(adjective, bad, evil, dangerous) | |
| pestilential(adjective, help, bad, evil, foul) | |
| putrid(adjective, rank, foul, disgusting, disagreeable) | |
| mischievous(adjective, mean, bad, nasty, offensive) | |
| venomous(adjective, mean, bad, evil, nasty) | |
| corrupting(adjective, immoral, distressing, injurious) | |
| fatal(adjective, bad, evil, dangerous) | |
| malign(adjective, mean, bad, evil, nasty) | |
| ruinous(adjective, mean, bad, wrong, evil) | |
| vicious(adjective, mean, bad, evil, nasty) | |
| pestiferous(adjective, bad, evil, injurious) | |
| prejudicial(adjective, cruel, unkind, distressing, upsetting) | |
| stinking(adjective, bad, evil, offensive, base) | |
| corrupt(adjective, bad, evil, base, foul) | |
| nocuous(adjective, cruel, unkind, distressing, upsetting) | |
| suicidal(adjective, violent, cruel, injurious) | |
| unhygienic(adjective, dirty, unhealthy, polluted) | |
| unsanitary(adjective, dirty, unhealthy, polluted) | |
| wicked(adjective, mean, bad, wrong, evil) |
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| APA | Smart Define. (2015). noxious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/noxious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "noxious thesaurus" https://smartdefine.org/noxious/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, noxious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/noxious/thesaurus/synonyms>. |
| MLA | Smart Define. "noxious thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/noxious/thesaurus/synonyms> |