Synonyms|72Antonyms|16|Broader|0Narrower|0Related|25

44 entries under obligatory topic. ×

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principal(adjective, significant, essential, basic, vital)
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significant(adjective, essential, basic, vital, required)
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unalterable(adjective, necessary, required, conclusive)
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vital(adjective, significant, essential, basic, required)
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APASmart Define. (2015). incumbent on thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/incumbent_on/thesaurus/synonyms
ChicagoSmart Define. 2015. "incumbent on thesaurus" https://smartdefine.org/incumbent_on/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, incumbent on thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/incumbent_on/thesaurus/synonyms>.
MLASmart Define. "incumbent on thesaurus" 8 May 2015. Web. 1 October 2026. <https://smartdefine.org/incumbent_on/thesaurus/synonyms>