554 entries under noun topic. ×

11
underpinning(support, action, cause, start)
10
bedrock(support, action, cause, start)
10
essence(organization, action, area, cause)
10
gist(organization, area, strength, substance)
10
motive(cause, start, reason, idea)
10
premise(concept, action, philosophy, cause)
10
rationale(concept, action, understanding, philosophy)
10
support(support, action, reason, substance)
9
assumption(concept, law, action, understanding)
9
bed(organization, support, area, substance)
9
cornerstone(law, idea, base, foundation)
8
presumption(concept, action, understanding, philosophy)
8
rest(support, base, foundation, stand)
8
rudiment(law, action, start, top)
8
seat(support, cause, start, reason)
8
substructure(organization, support, study, area)
7
antecedent(action, cause, reason, object)
7
crux(organization, action, area, quality)
7
element(feature, law, drop, part)
7
infrastructure(organization, support, action, cause)
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APASmart Define. (2015). basis thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/basis/thesaurus/synonyms
ChicagoSmart Define. 2015. "basis thesaurus" https://smartdefine.org/basis/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, basis thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/basis/thesaurus/synonyms>.
MLASmart Define. "basis thesaurus" 22 December 2015. Web. 26 September 2026. <https://smartdefine.org/basis/thesaurus/synonyms>