81 entries under base topic. ×

4
seat(noun, support, rest, balance)
3
cornerstone(noun, hold, block, back)
3
hardpan
2
bedding(noun, hold, block, back)
2
carped
2
deck
2
earth
2
flag
2
paving
2
stand(noun, support, rest, center)
1
abutment(noun, hold, block, back)
1
agency(noun, hold, block, back)
1
back(noun, hold, block, foundation)
1
backing(noun, hold, block, back)
1
baseboard
1
bilge
1
block(noun, hold, back, foundation)
1
brace(noun, hold, block, back)
1
buttress(noun, hold, block, back)
1
collar(noun, hold, block, back)
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APASmart Define. (2015). substructure thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/substructure/thesaurus/synonyms
ChicagoSmart Define. 2015. "substructure thesaurus" https://smartdefine.org/substructure/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, substructure thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/substructure/thesaurus/synonyms>.
MLASmart Define. "substructure thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/substructure/thesaurus/synonyms>