- Definitions|1
- Thesaurus|132
- Abbreviations|0
8 entries under unsound topic. ×
| invalid(adjective, void, worthless, unacceptable) | |
| bad(adjective, false, unreasonable, unacceptable) | |
| worthless(adjective, weak, inferior, inadequate, feeble) | |
| ineffective(adjective, inferior, inadequate, limited, feeble) | |
| ineffectual(adjective, inferior, inadequate, limited, feeble) | |
| unsanctioned(adjective, void, ineffective, ineffectual) | |
| useless(adjective, weak, inferior, inadequate, limited) | |
| vain(adjective, weak, inferior, inadequate, feeble) |
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| APA | Smart Define. (2015). null and void thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/null_and_void/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "null and void thesaurus" https://smartdefine.org/null_and_void/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, null and void thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/null_and_void/thesaurus/synonyms>. |
| MLA | Smart Define. "null and void thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/null_and_void/thesaurus/synonyms> |