107 entries under basic topic. ×
| grass-roots(adjective, important, significant, original, essential) | |
| ideal(lead, heavy, worthy, absolute) | |
| innate(material, natural, absolute, fundamental) | |
| live(material, natural, living, functional) | |
| living(material, natural, functional, nuclear) | |
| meat-and-potatoes(adjective, important, significant, original, essential) | |
| natural(adjective, material, living, functional) | |
| needed(adjective, important, significant, capital, essential) | |
| nuclear(material, natural, living, functional) | |
| perfect(adjective, bad, tough, top, outstanding) | |
| plasmic(material, natural, living, functional) | |
| prerequisite(adjective, important, significant, capital, essential) | |
| pressing(adjective, big, important, significant, substantial) | |
| primordial(adjective, important, significant, original, essential) | |
| quintessential(adjective, important, significant, essential) | |
| structural(material, important, natural, original) | |
| 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. (2016). principal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |