57 entries under essential topic. ×
| basic(adjective, important, significant, critical) | |
| compelling(adjective, important, significant, serious) | |
| fundamental(adjective, important, significant, capital) | |
| cardinal(adjective, important, significant, capital) | |
| chief(adjective, important, significant, serious, capital) | |
| coal-and-ice(important, critical, basic, fundamental) | |
| constitutive(important, capital, critical, basic) | |
| decisive(adjective, important, significant, critical) | |
| exigent(adjective, important, significant, serious) | |
| integral(important, critical, basic, fundamental) | |
| of the essence(expression, adjective, idiom, necessary) | |
| principal(adjective, important, significant, serious, capital) | |
| unavoidable(adjective, certain, significant, sure) | |
| bottom-line(adjective, important, significant, critical) | |
| elementary(adjective, significant, basic, vital) | |
| expedient(adjective, significant, basic, vital) | |
| heavy(important, critical, basic, key) | |
| incumbent on(expression, adjective, significant, basic) | |
| key(important, critical, basic, fundamental) | |
| life-or-death(adjective, important, critical, basic) |
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| APA | Smart Define. (2015). required thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/required/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, required thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>. |
| MLA | Smart Define. "required thesaurus" 3 November 2015. Web. 22 September 2026. <https://smartdefine.org/required/thesaurus/synonyms> |