61 entries under adjective topic. ×

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duteous(obedient, conscientious, well-behaved)
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elementary(significant, essential, basic, vital)
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essential(significant, basic, vital, necessary)
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faithful(obedient, conscientious, well-behaved)
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indispensable(significant, essential, basic, vital)
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indissoluble(necessary, required, obligatory, conclusive)
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irrevocable(necessary, required, obligatory, conclusive)
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loyal(obedient, well-behaved)
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obedient(conscientious, well-behaved)
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paramount(significant, essential, basic, vital)
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prime(significant, essential, basic, vital)
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principal(significant, essential, basic, vital)
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punctilious(obedient, conscientious, well-behaved)
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regardful(obedient, conscientious, well-behaved)
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respectful(obedient, conscientious, well-behaved)
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reverential(obedient, conscientious, well-behaved)
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significant(essential, basic, vital, required)
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submissive(obedient, conscientious, well-behaved)
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unalterable(necessary, required, obligatory, conclusive)
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vital(significant, essential, basic, required)
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APASmart Define. (2015). incumbent on thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/incumbent_on/thesaurus/synonyms
ChicagoSmart Define. 2015. "incumbent on thesaurus" https://smartdefine.org/incumbent_on/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, incumbent on thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/incumbent_on/thesaurus/synonyms>.
MLASmart Define. "incumbent on thesaurus" 8 May 2015. Web. 29 September 2026. <https://smartdefine.org/incumbent_on/thesaurus/synonyms>