37 entries under significant topic. ×
| compulsory(adjective, set, affected, essential) | |
| required(adjective, right, essential, basic) | |
| obligatory(adjective, right, affected, essential) | |
| imperative(adjective, set, essential, basic) | |
| requisite(adjective, essential, basic, vital) | |
| indispensable(adjective, set, essential, basic) | |
| essential(adjective, set, basic, vital) | |
| binding(adjective, set, affected, essential) | |
| needed(adjective, set, essential, basic) | |
| prerequisite(adjective, set, essential, basic) | |
| de rigueur(expression, adjective, idiom, right) | |
| compelling(adjective, essential, basic, vital) | |
| needful(adjective, set, essential, basic) | |
| vital(adjective, set, essential, basic) | |
| pressing(adjective, essential, basic, vital) | |
| crucial(adjective, essential, basic, vital) | |
| exigent(adjective, essential, basic, vital) | |
| urgent(adjective, essential, basic, vital) | |
| basic(adjective, essential, vital, fundamental) | |
| decisive(adjective, set, essential, basic) |
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| APA | Smart Define. (2015). mandatory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/mandatory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mandatory thesaurus" https://smartdefine.org/mandatory/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, mandatory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/mandatory/thesaurus/synonyms>. |
| MLA | Smart Define. "mandatory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/mandatory/thesaurus/synonyms> |