| elementary(adjective, significant, essential, basic, vital) | |
| enjoined | |
| expected | |
| expedient(adjective, significant, essential, basic, vital) | |
| fated(obvious, inevitable, inescapable) | |
| favored(verb, obliged) | |
| filled | |
| filmed | |
| final | |
| gestated | |
| good(necessary, wanted, needed) | |
| guided | |
| hard-and-fast | |
| hard and fast(expression, idiom) | |
| heavy(important, essential, critical, basic, key) | |
| hired | |
| in demand(expression, adjective, idiom, requirement) | |
| in hock(noun, expression, loss, discrepancy, deficit) | |
| in the hole(noun, expression, idiom, loss, deficit) | |
| in the red(noun, expression, idiom, loss, discrepancy) |
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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> |