34 entries under original topic. ×

1
radical(important, basic, vital, primary)
1
requisite(important, significant, basic, vital)
1
rudimentary(important, significant, basic, vital)
1
significant(important, basic, vital, major)
1
substratal(important, significant, basic, vital)
1
substrative(important, significant, basic, vital)
1
supporting(important, significant, basic, vital)
1
sustaining(important, significant, basic, vital)
1
theoretical(important, significant, basic, vital)
1
underived(important, significant, basic, vital)
1
underlying(important, basic, vital, primary)
1
vital(adjective, material, important, natural)
0
deep(basic, primary)
0
deep-seated(basic, primary)
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APASmart Define. (2015). structural thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/structural/thesaurus/synonyms
ChicagoSmart Define. 2015. "structural thesaurus" https://smartdefine.org/structural/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, structural thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/structural/thesaurus/synonyms>.
MLASmart Define. "structural thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/structural/thesaurus/synonyms>