- Definitions|2
- Thesaurus|2.2k
- Abbreviations|0
84 entries under main topic. ×
| basic(noun, adjective, characteristic, drop, part) | |
| essential(noun, adjective, support, action, characteristic) | |
| primary(adjective, body, simple, plain, material) | |
| underlying(adjective, simple, plain, important, straightforward) | |
| cardinal(noun, adjective, important, head, significant) | |
| central(adjective, important, significant, original, essential) | |
| necessary(noun, adjective, body, material, important) | |
| principal(noun, adjective, body, material, important) | |
| key(noun, adjective, important, head, significant) | |
| radical(adjective, important, significant, original, essential) | |
| prime(adjective, body, material, pure, important) | |
| crucial(adjective, important, significant, original, capital) | |
| vital(adjective, body, material, important, significant) | |
| first(adjective, order, violent, important, opening) | |
| indispensable(adjective, characteristic, important, significant, natural) | |
| important(adjective, significant, original, essential, critical) | |
| chief(adjective, important, significant, essential, basic) | |
| paramount(adjective, important, significant, original, essential) | |
| significant(adjective, important, original, essential, critical) | |
| core(noun, adjective, support, action, cause) |
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| APA | Smart Define. (2016). fundamental thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, fundamental thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>. |
| MLA | Smart Define. "fundamental thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms> |