55 entries under obligatory topic. ×
| momentous(adjective, important, significant, serious, essential) | |
| paramount(adjective, important, significant, serious, essential) | |
| quintessential(adjective, significant, essential, basic, vital) | |
| right(adjective, correct, proper, flawless, faultless) | |
| set(adjective, obvious, compulsory, inevitable) | |
| significant(adjective, important, essential, critical, basic) | |
| specified(adjective, significant, essential, basic, vital) | |
| all-important(adjective, significant, essential, basic, vital) | |
| correct(right, proper, flawless, faultless, textbook) | |
| counted upon(expression, necessary, conclusive) | |
| indissoluble(necessary, conclusive) | |
| name of game(expression, adjective, idiom, significant, essential) | |
| proper(correct, right, flawless, faultless, textbook) | |
| unalterable(necessary, conclusive) | |
| prime(adjective, significant, essential, basic, vital) |
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| APA | Smart Define. (2015). required thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/required/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, required thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>. |
| MLA | Smart Define. "required thesaurus" 3 November 2015. Web. 27 September 2026. <https://smartdefine.org/required/thesaurus/synonyms> |