200 entries under adjective topic. ×
| big(great, significant, substantial, large) | |
| bottom(important, significant, original, essential) | |
| capital(important, serious, essential, critical) | |
| in demand(expression, idiom, basic, main) | |
| incumbent on(expression, essential, required, obligatory) | |
| irrevocable(expected, predictable, inexorable, required) | |
| life-or-death(important, essential, critical, basic) | |
| material(big, significant, substantial, valuable) | |
| prescribed(expected, predictable, inexorable, obligatory) | |
| reasonable(sound, sensible, rational, probable) | |
| relevant(clear, sound, reasonable, sensible) | |
| specified(essential, required, needed) | |
| suitable(wanted, obligatory, needed, compulsory) | |
| unescapable(certain, obvious, inevitable, inescapable) | |
| axiological(important, significant, original, essential) | |
| constitutional(body, material, important, significant) | |
| first(important, significant, original, essential) | |
| fitting | |
| foremost(important, significant, capital, essential) | |
| foundational(important, significant, original, essential) |
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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> |