93 entries under basic topic. ×
| life-or-death(adjective, important, essential, critical) | |
| 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) | |
| cellular(material, natural, living, functional) | |
| coal-and-ice(important, essential, critical, fundamental) | |
| compulsion(noun, want, need, essential, certainty) | |
| constitutional(adjective, body, material, important, significant) | |
| constitutive(important, original, capital, essential, critical) | |
| exigency(noun, want, need, essential, certainty) | |
| first(adjective, important, significant, original, essential) | |
| foundational(adjective, important, significant, original, essential) | |
| grass-roots(adjective, important, significant, original, essential) | |
| live(material, natural, living, functional) | |
| living(material, natural, functional, nuclear) | |
| major(adjective, important, significant, original, essential) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 20 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |