32 entries under primary topic. ×
| requisite(important, significant, original, basic, vital) | |
| rudimentary(important, significant, original, basic, vital) | |
| significant(important, original, basic, vital, major) | |
| substratal(important, significant, original, basic, vital) | |
| substrative(important, significant, original, basic, vital) | |
| supporting(important, significant, original, basic, vital) | |
| sustaining(important, significant, original, basic, vital) | |
| theoretical(important, significant, original, basic, vital) | |
| underived(important, significant, original, basic, vital) | |
| underlying(important, original, basic, vital) | |
| deep(original, basic) | |
| deep-seated(original, basic) |
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| APA | Smart Define. (2015). structural thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/structural/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "structural thesaurus" https://smartdefine.org/structural/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, structural thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/structural/thesaurus/synonyms>. |
| MLA | Smart Define. "structural thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/structural/thesaurus/synonyms> |