84 entries under fundamental topic. ×
| radical(adjective, cause, base, importance, important) | |
| vital(adjective, body, importance, material, big) | |
| introductory(adjective, simple, plain, head, beginning) | |
| ultimate(adjective, essential, supreme, intervening) | |
| simple(adjective, top, pure, straightforward, basic) | |
| constitutional(adjective, body, material, important, significant) | |
| crucial(adjective, big, important, significant, original) | |
| foundational(adjective, simple, plain, base, pure) | |
| opening(adjective, head, beginning, original, basic) | |
| early(adjective, simple, head, beginning, original) | |
| embryonic(cause, simple, original, basic) | |
| indispensable(adjective, important, significant, original, serious) | |
| material(adjective, body, big, important, significant) | |
| necessary(adjective, body, material, big, important) | |
| abecedarian(adjective, simple, straightforward, basic) | |
| bottom(adjective, important, significant, original, essential) | |
| critical(adjective, big, important, significant, substantial) | |
| inherent(adjective, body, material, natural, animate) | |
| intrinsic(adjective, important, significant, original, essential) | |
| connate(adjective, cause, basic, absolute) |
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| APA | Smart Define. (2016). primary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/primary/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, primary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>. |
| MLA | Smart Define. "primary thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms> |