57 entries under essential topic. ×
| necessary(adjective, right, important, critical) | |
| needed(verb, adjective, close, correct, exact) | |
| compulsory(adjective, significant, basic, vital) | |
| requisite(adjective, close, correct, exact, important) | |
| indispensable(adjective, important, significant, serious) | |
| obligatory(adjective, right, significant, basic) | |
| imperative(adjective, important, significant, critical) | |
| mandatory(adjective, right, significant, basic) | |
| needful(adjective, important, significant, capital) | |
| vital(adjective, important, significant, serious) | |
| wanted(verb, adjective, important, significant, serious) | |
| prerequisite(adjective, important, significant, critical) | |
| binding(adjective, significant, basic, vital) | |
| urgent(adjective, important, significant, critical) | |
| called for(verb, expression, adjective, phrasal verb, right) | |
| pressing(adjective, important, significant, serious) | |
| de rigueur(expression, adjective, idiom, right, significant) | |
| critical(adjective, important, basic, fundamental) | |
| crucial(adjective, important, significant, serious, capital) | |
| important(adjective, critical, vital, 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> |