200 entries under adjective topic. ×
| grass-roots(important, significant, original, essential) | |
| grave(great, big, important, significant) | |
| high-priority | |
| highest(key, chief, foremost) | |
| leading(important, serious, capital, essential) | |
| life-and-death | |
| major(important, significant, original, essential) | |
| meaningful(big, important, significant, substantial) | |
| meat-and-potatoes(important, significant, original, essential) | |
| name of game(expression, idiom, essential, required) | |
| nitty-gritty(important, original, essential, critical) | |
| original(body, material, important, significant) | |
| pertinent(clear, sound, reasonable, sensible) | |
| pivotal | |
| powerful(important, prominent, exalted) | |
| primordial(important, significant, original, essential) | |
| proper | |
| proviso | |
| radical(important, significant, original, essential) | |
| ratiocinative(clear, sound, logical) |
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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> |