75 entries under essential topic. ×
| axiological(adjective, important, significant, original) | |
| bottom-line(adjective, important, significant, original) | |
| critical(adjective, great, important, original, serious) | |
| first(adjective, important, significant, original, sophisticated) | |
| grass-roots(adjective, important, significant, original) | |
| indispensable(adjective, important, significant, original) | |
| meat-and-potatoes(adjective, base, important, significant, last) | |
| necessary(adjective, important, significant, original) | |
| requisite(adjective, important, significant, original) | |
| substratal(adjective, important, significant, original) | |
| substrative(adjective, important, significant, original) | |
| supporting(adjective, important, significant, original) | |
| supreme(adjective, fundamental) | |
| sustaining(adjective, important, significant, original) | |
| theoretical(adjective, important, significant, original) | |
| underived(adjective, important, significant, original) | |
| best(adjective, fundamental, supreme) | |
| bottom line(expression, important, significant, basic) | |
| categorical(adjective, fundamental, supreme) | |
| empyreal(adjective, fundamental, supreme) |
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| APA | Smart Define. (2016). radical thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/radical/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "radical thesaurus" https://smartdefine.org/radical/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, radical thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/radical/thesaurus/synonyms>. |
| MLA | Smart Define. "radical thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/radical/thesaurus/synonyms> |