98 entries under adjective topic. ×
| necessary(sound, right, essential, obligation) | |
| mandatory(right, significant, affected, essential) | |
| compulsory(sound, important, certain, true) | |
| requisite(appropriate, proper, significant, suitable) | |
| essential(important, significant, critical, basic) | |
| imperative(important, significant, essential, basic) | |
| required(right, significant, essential, basic) | |
| binding(sound, certain, true, significant) | |
| indispensable(important, significant, essential, critical) | |
| prerequisite(significant, essential, basic, vital) | |
| inevitable(certain, obvious, expected, predictable) | |
| peremptory(affected, duty, compulsion, strained) | |
| involuntary(affected, strained, unwilling, unnatural) | |
| demanded | |
| incumbent | |
| bounden(necessary, required, conclusive, obliged) | |
| constraining | |
| de rigueur(expression, right, significant, essential) | |
| forced(affected, strained, artificial, unwilling) | |
| must |
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| APA | Smart Define. (2015). obligatory thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, obligatory thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>. |
| MLA | Smart Define. "obligatory thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms> |