80 entries under basic topic. ×

1
primordial(important, significant, original, vital)
1
principal(material, important, natural, original)
1
rudimentary(important, significant, original, vital)
1
structural(material, important, significant, natural)
1
substratal(adjective, important, significant, original, essential)
1
substrative(adjective, important, significant, original, essential)
1
supporting(important, significant, original, vital)
1
sustaining(important, significant, original, vital)
1
theoretical(important, significant, original, vital)
1
underived(adjective, important, significant, original, essential)
1
underlined(important, essential, critical, fundamental)
0
bottom line(expression, important, significant, essential)
0
combining
0
composing(essential, constituent)
0
constituting
0
deep(original, primary)
0
division
0
forming
0
grassroots(important, significant, essential, vital)
0
portion
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APASmart Define. (2016). integral thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/integral/thesaurus/synonyms
ChicagoSmart Define. 2016. "integral thesaurus" https://smartdefine.org/integral/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, integral thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/integral/thesaurus/synonyms>.
MLASmart Define. "integral thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/integral/thesaurus/synonyms>