6 entries under weakness topic. ×
| invalidity | |
| impotence | |
| incompetence | |
| ineffectiveness | |
| lethargy | |
| uselessness |
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| APA | Smart Define. (2015). validity thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/validity/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "validity thesaurus" https://smartdefine.org/validity/thesaurus/antonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, validity thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/validity/thesaurus/antonyms>. |
| MLA | Smart Define. "validity thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/validity/thesaurus/antonyms> |