200 entries under adjective topic. ×
| returnless(certain, inevitable) | |
| right(noun, want, essential, obligation) | |
| rudimentary(important, significant, original, essential) | |
| special(key, chief, foremost) | |
| stipulated | |
| strategic | |
| substantial(great, big, significant, large) | |
| substratal(important, significant, original, essential) | |
| substrative(important, significant, original, essential) | |
| supporting(important, significant, original, essential) | |
| supreme(key, chief, foremost) | |
| sustaining(important, significant, original, essential) | |
| theoretical(important, significant, original, essential) | |
| underived(important, significant, original, essential) | |
| valuable(great, big, significant, substantial) | |
| abundant(adequate, satisfactory, enough) | |
| acceptable(right, adequate, satisfactory, enough) | |
| adequate(satisfactory, enough) | |
| agreeable(adequate, satisfactory, enough, wanted) | |
| all right(expression, adequate, satisfactory, enough) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 25 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |