60 entries under fundamental topic. ×
| prime(adjective, body, material, important, significant) | |
| central(adjective, important, significant, original, essential) | |
| demand(noun, want, need, essential, certainty) | |
| desideratum(noun, want, need, essential, certainty) | |
| elementary(adjective, easy, important, significant, original) | |
| integral(adjective, body, material, important, significant) | |
| necessitous(adjective, important, capital, essential, vital) | |
| primary(adjective, body, material, big, important) | |
| want(noun, verb, need, essential, certainty) | |
| basal(adjective, body, material, important, significant) | |
| underlying(adjective, important, significant, original, essential) | |
| bottom-line(adjective, important, significant, original, essential) | |
| elemental(adjective, body, material, important, significant) | |
| intrinsic(adjective, important, significant, original, essential) | |
| primitive(adjective, body, material, important, significant) | |
| bottom(adjective, important, significant, original, essential) | |
| capital(adjective, important, serious, essential, critical) | |
| core(original, key, main, chief) | |
| coal-and-ice(important, essential, critical, basic) | |
| compulsion(noun, want, need, essential, certainty) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 27 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |