107 entries under basic topic. ×
| needful(adjective, important, significant, original, capital) | |
| primitive(adjective, body, material, important, significant) | |
| required(adjective, important, significant, serious, capital) | |
| urgent(adjective, great, big, significant, substantial) | |
| amoebic(material, natural, living, functional) | |
| anatomical(material, natural, living, functional) | |
| animate(material, natural, living, functional) | |
| axiological(adjective, important, significant, original, essential) | |
| axiomatic(important, significant, original, vital) | |
| biological(material, natural, living, functional) | |
| biotic(material, natural, living, functional) | |
| bottom(adjective, important, significant, original, essential) | |
| bottom-line(adjective, important, significant, original, essential) | |
| cellular(material, natural, living, functional) | |
| constitutive(important, original, serious, capital) | |
| decisive(adjective, great, big, important, significant) | |
| deep-seated(adjective, original, absolute, fundamental) | |
| exigent(adjective, big, significant, substantial, large) | |
| factor(essential, representative, operative, manager) | |
| foundational(adjective, important, significant, original, essential) |
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| APA | Smart Define. (2016). principal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |