107 entries under basic topic. ×

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mandatory(adjective, significant, essential, vital)
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name of game(expression, adjective, idiom, significant, essential)
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obligatory(adjective, significant, essential, vital)
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part
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portion
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specified(adjective, significant, essential, vital)
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unavoidable(adjective, significant, essential, vital)
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APASmart Define. (2016). principal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/principal/thesaurus/synonyms
ChicagoSmart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, principal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>.
MLASmart Define. "principal thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms>