67 entries under adjective topic. ×
| false(open, sound, right, wrong) | |
| invalid(false, worthless, illegal, unfounded) | |
| unconvincing | |
| unreal(false, illegal) | |
| unsound(strong, sound, false, well) | |
| wrong(false, illegal) | |
| fallacious | |
| illegitimate(false, illegal) | |
| illogical | |
| null(ineffectual, valueless) | |
| void(meaningless, nullified) | |
| fake(false, illegal) | |
| specious | |
| fraudulent(open, false, genuine, deceptive) | |
| surreal | |
| unacceptable(false, illegal) | |
| unreasonable | |
| bogus | |
| counterfeit(honest, false, genuine, illegal) | |
| delusive |
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| APA | Smart Define. (2016). valid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/valid/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/antonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, valid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/valid/thesaurus/antonyms>. |
| MLA | Smart Define. "valid thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/valid/thesaurus/antonyms> |