47 entries under essential topic. ×
| necessary(adjective, sound, right, obligation) | |
| mandatory(adjective, right, significant, affected) | |
| compulsory(adjective, sound, important, certain, true) | |
| requisite(adjective, appropriate, proper, significant, suitable) | |
| imperative(adjective, important, significant, basic) | |
| required(adjective, right, significant, basic) | |
| binding(adjective, sound, certain, true, significant) | |
| indispensable(adjective, important, significant, critical) | |
| prerequisite(adjective, significant, basic, vital) | |
| de rigueur(expression, adjective, right, significant) | |
| pressing(adjective, important, significant, critical) | |
| unavoidable(adjective, certain, significant, basic) | |
| urgent(adjective, important, significant, critical) | |
| enforced(adjective, affected, strained, unnatural) | |
| exigent(adjective, important, significant, critical) | |
| imperious(adjective, commanding, required, authoritative) | |
| needful(adjective, significant, basic, vital) | |
| vital(adjective, important, significant, critical) | |
| coercive(adjective, affected, compulsion, strained) | |
| compelling(adjective, significant, basic, vital) |
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| APA | Smart Define. (2015). obligatory thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, obligatory thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>. |
| MLA | Smart Define. "obligatory thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms> |