- Definitions|3
- Thesaurus|567
- Abbreviations|0
47 entries under vital topic. ×
| basic(adjective, simple, plain, base, important) | |
| essential(adjective, simple, plain, important, significant) | |
| primary(adjective, simple, plain, base, important) | |
| elementary(adjective, simple, plain, important, significant) | |
| elemental(adjective, simple, plain, important, significant) | |
| cardinal(noun, adjective, important, significant, original) | |
| radical(adjective, base, important, significant, last) | |
| rudimentary(adjective, simple, plain, important, significant) | |
| basal(adjective, simple, plain, base, important) | |
| intrinsic(adjective, important, significant, original, essential) | |
| primitive(adjective, simple, plain, important, significant) | |
| bottom(noun, adjective, important, significant, original) | |
| prime(adjective, important, significant, original, essential) | |
| principal(adjective, important, significant, original, essential) | |
| crucial(adjective, important, significant, original, essential) | |
| foundational(adjective, simple, plain, base, important) | |
| original(adjective, simple, plain, important, significant) | |
| central(adjective, top, important, significant, original) | |
| constitutional(adjective, important, significant, original, essential) | |
| indispensable(adjective, important, significant, original, essential) |
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| APA | Smart Define. (2015). underlying thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/underlying/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underlying thesaurus" https://smartdefine.org/underlying/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, underlying thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/underlying/thesaurus/synonyms>. |
| MLA | Smart Define. "underlying thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/underlying/thesaurus/synonyms> |