289 entries under adjective topic. ×
| serious(bad, offensive, foul, revolting) | |
| severe(bad, offensive, foul, revolting) | |
| stenchy(foul, rotten, stinking, smelly) | |
| stuffy(rotten, stinking, smelly, putrid) | |
| toxicant | |
| treacherous(harmful, dangerous, injurious, detrimental) | |
| ugly(bad, evil, offensive, base) | |
| unappetizing(bad, offensive, foul, revolting) | |
| unclean(bad, offensive, dirty, foul) | |
| uncool(mean, nasty, awful, dirty) | |
| unsafe(dangerous, injurious, damaging, destructive) | |
| unsavory(unhealthy, unwholesome, unpalatable, indigestible) | |
| alarming | |
| annihilative(harmful, injurious, damaging, deadly) | |
| bitter(mean, nasty, hateful, petty) | |
| calamitous(harmful, injurious, damaging, deadly) | |
| cataclysmic(harmful, injurious, damaging, deadly) | |
| consumptive(harmful, injurious, damaging, deadly) | |
| creepy-crawly(awful, dirty, gloom, badly) | |
| critical |
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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> |