82 entries under significant topic. ×
| basal(adjective, body, material, important) | |
| underlying(adjective, important, original, essential) | |
| bottom-line(adjective, important, original, essential) | |
| elemental(adjective, body, material, important) | |
| influential(adjective, great, big, important) | |
| intrinsic(adjective, important, original, essential) | |
| primitive(adjective, body, material, important) | |
| serious(adjective, big, important, substantial) | |
| big(adjective, great, substantial, large) | |
| bottom(adjective, important, original, essential) | |
| considerable(big, substantial, valuable, vital) | |
| importunate(big, important, substantial, serious) | |
| material(adjective, big, substantial, valuable) | |
| relevant(adjective, clear, sound, reasonable, sensible) | |
| weighty(big, important, substantial, valuable) | |
| axiological(adjective, important, original, essential) | |
| axiomatic(important, original, basic, vital) | |
| big-league(vital, imperative) | |
| conspicuous(vital, imperative) | |
| constitutional(adjective, body, material, important) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 24 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |