24 entries under basic topic. ×

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required(important, essential, critical, fundamental)
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requisite(important, essential, critical, fundamental)
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urgent(important, essential, critical, fundamental)
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essential(important, critical, fundamental, imperative)
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APASmart Define. (2015). underlined thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underlined/thesaurus/synonyms
ChicagoSmart Define. 2015. "underlined thesaurus" https://smartdefine.org/underlined/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, underlined thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underlined/thesaurus/synonyms>.
MLASmart Define. "underlined thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/underlined/thesaurus/synonyms>