5
root(noun, organization, support, action, cause)
5
stay(noun, support, hold, block, back)
5
substratum(noun, support, action, hold, cause)
5
supporting(verb, adjective, supporting)
4
bed(noun, support, hold, block, back)
4
principle(noun, support, action, base, beginning)
4
reinforcement(noun, support, hold, block, back)
3
basement(noun, support, rest, base, balance)
3
bolster(noun, support, stay, bar, prop)
3
crutch(noun, support, leg)
3
foot(noun, support, substance, authority, rest)
3
fundamental(noun, support, action, cause, start)
3
grounds(noun, reason, substance, basis, justification)
3
seat(noun, support, cause, start, reason)
3
shore(noun, support, hold, block, back)
3
understructure(noun, support, substance, authority, base)
2
bedding(noun, hold, block, back, base)
2
cornerstone(noun, hold, block, back, base)
2
corroborating
2
pillar(noun, support, hold, block, back)
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APASmart Define. (2015). underpinning thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/underpinning/thesaurus/synonyms
ChicagoSmart Define. 2015. "underpinning thesaurus" https://smartdefine.org/underpinning/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, underpinning thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/underpinning/thesaurus/synonyms>.
MLASmart Define. "underpinning thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/underpinning/thesaurus/synonyms>