| elementary(important, significant, original, basic, vital) | |
| essential(adjective, material, important, natural, basic) | |
| evidence-informed | |
| fabric | |
| fabrics | |
| first(important, significant, original, basic, vital) | |
| formalistic(adjective, fundamental) | |
| foundational(important, significant, original, basic, vital) | |
| geophysics | |
| glossematic | |
| glottochronological | |
| grammatic | |
| graphemic | |
| grass-roots(important, significant, original, basic, vital) | |
| housing | |
| indispensable(important, significant, original, basic, vital) | |
| innate(adjective, material, natural, basic, living) | |
| intransitive | |
| intrinsic(important, significant, original, basic, vital) | |
| ironworker |
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| APA | Smart Define. (2015). structural thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/structural/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "structural thesaurus" https://smartdefine.org/structural/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, structural thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/structural/thesaurus/synonyms>. |
| MLA | Smart Define. "structural thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/structural/thesaurus/synonyms> |