44 entries under primary topic. ×
| integral(adjective, important, significant, original, essential) | |
| intrinsic(adjective, important, significant, original, essential) | |
| key(adjective, important, significant, original, essential) | |
| major(adjective, important, significant, original, essential) | |
| meat-and-potatoes(adjective, important, significant, original, essential) | |
| necessary(adjective, important, significant, original, essential) | |
| original(adjective, obscure, extraordinary, superior, important) | |
| paramount(adjective, important, significant, original, essential) | |
| prime(adjective, important, significant, original, essential) | |
| primitive(adjective, important, significant, original, essential) | |
| principal(adjective, important, significant, original, essential) | |
| radical(adjective, important, significant, original, essential) | |
| requisite(adjective, important, significant, original, essential) | |
| rudimentary(adjective, important, significant, original, essential) | |
| significant(adjective, important, original, essential, basic) | |
| structural(important, significant, original, basic, vital) | |
| substratal(adjective, important, significant, original, essential) | |
| substrative(adjective, important, significant, original, essential) | |
| supporting(adjective, important, significant, original, essential) | |
| sustaining(adjective, important, significant, original, essential) |
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| APA | Smart Define. (2015). theoretical thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/theoretical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "theoretical thesaurus" https://smartdefine.org/theoretical/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, theoretical thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/theoretical/thesaurus/synonyms>. |
| MLA | Smart Define. "theoretical thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/theoretical/thesaurus/synonyms> |