| chartered | |
| chief(adjective, important, significant, serious, capital) | |
| claimed | |
| coal-and-ice(important, essential, critical, basic, fundamental) | |
| coerced | |
| collected | |
| commanded(verb, adjective) | |
| compulsatory(adjective, commanding, obligatory, authoritative, domineering) | |
| conclusive(necessary, obligatory) | |
| conducted | |
| considered | |
| constitutive(important, capital, essential, critical, basic) | |
| constraining(adjective, obligatory) | |
| decisive(adjective, important, significant, essential, critical) | |
| enforced(verb, adjective, obligatory, compulsory, mandatory) | |
| exacted | |
| exigent(adjective, important, significant, serious, essential) | |
| inescapable(adjective, obvious, inevitable) | |
| inexorable(adjective, obvious, inevitable, inescapable) | |
| integral(important, essential, critical, basic, fundamental) |
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| APA | Smart Define. (2015). required thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/required/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, required thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>. |
| MLA | Smart Define. "required thesaurus" 3 November 2015. Web. 21 September 2026. <https://smartdefine.org/required/thesaurus/synonyms> |