| harsh | |
| hazy | |
| hideous | |
| hopeless | |
| horrible | |
| horrid | |
| ill-favored | |
| illegal(adjective, mean, rude, unreasonable, dishonest) | |
| immoderate | |
| immoral | |
| improper | |
| inadequate(adjective, unfit) | |
| incorrect | |
| insidious(adjective, tricky, sneaky) | |
| insufficient(adjective, inadequate, unfit) | |
| loathsome | |
| mucky | |
| muddy | |
| murky | |
| nasty |
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| APA | Smart Define. (2016). fair thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fair/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "fair thesaurus" https://smartdefine.org/fair/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, fair thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fair/thesaurus/antonyms>. |
| MLA | Smart Define. "fair thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/fair/thesaurus/antonyms> |