140 entries under noun topic. ×

5
principle(support, action, base, beginning)
5
seat(support, cause, start, reason)
5
support(support, action, substance, authority)
5
underpinning(support, action, hold, cause)
4
course
4
layer(layer, coating, tier)
4
material
4
stratum
3
body(materiality, substantiality)
3
core(support, action, cause, start)
3
fundamental(adjective, support, action, cause)
3
rest(support, hold, block, back)
2
bedding(hold, block, back, base)
2
being
2
block(support, hold, back, base)
2
creature
2
foot(support, substance, authority, rest)
2
fulcrum(support, hold, block, back)
2
hold(support, block, back, base)
2
parenchyma
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APASmart Define. (2015). substratum thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/substratum/thesaurus/synonyms
ChicagoSmart Define. 2015. "substratum thesaurus" https://smartdefine.org/substratum/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, substratum thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/substratum/thesaurus/synonyms>.
MLASmart Define. "substratum thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/substratum/thesaurus/synonyms>