82 entries under significant topic. ×
| essential(noun, adjective, body, material, big) | |
| requisite(noun, adjective, important, want, need) | |
| indispensable(adjective, important, original, essential) | |
| vital(adjective, body, material, big, important) | |
| important(adjective, original, substantial, serious) | |
| crucial(adjective, big, important, original) | |
| organic(adjective, important, natural, animate) | |
| basic(noun, adjective, body, material, important) | |
| key(adjective, important, original, essential) | |
| cardinal(noun, adjective, important, original) | |
| main(adjective, important, original, capital) | |
| principal(adjective, body, material, big, important) | |
| chief(adjective, big, important, substantial) | |
| critical(adjective, big, important, substantial) | |
| prime(adjective, body, material, important) | |
| paramount(adjective, important, original, substantial) | |
| central(adjective, important, original, essential) | |
| elementary(adjective, easy, important, original) | |
| integral(adjective, body, material, important) | |
| primary(adjective, body, material, big, important) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 22 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |