| nitty-gritty(adjective, important, original, essential, critical) | |
| particular(chief, foremost) | |
| radical(adjective, important, significant, original, essential) | |
| special(adjective, chief, foremost) | |
| substantial(adjective, great, big, significant, large) | |
| substratal(adjective, important, significant, original, essential) | |
| supreme(adjective, chief, foremost) | |
| underlined(important, essential, critical, basic, fundamental) | |
| valuable(adjective, great, big, significant, substantial) | |
| controlling(chief, foremost) | |
| focal(chief, foremost) | |
| outstanding(chief, foremost) | |
| predominant(basic, main, chief, foremost) | |
| preeminent(chief, foremost) | |
| premier(chief, foremost) | |
| prevailing(chief, foremost) | |
| star(chief, foremost) | |
| stellar(chief, foremost) |
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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> |