1
monad
1
mopboard
1
motive(cause, reason, source, basis, justification)
1
natural world
1
nether side
1
nethermost level
1
nexus(noun, support, action, base, beginning)
1
nucleus(noun, support, action, cause, start)
1
object
1
occasion(cause, reason, source, basis, justification)
1
overlayer
1
overstory
1
pabulum
1
paving
1
person
1
physical world
1
pillar(noun, hold, block, back, base)
1
plank
1
platter
1
plenum
11 years ago|4.2k views|share |citing 
APASmart Define. (2015). substratum thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/substratum/thesaurus/synonyms
ChicagoSmart Define. 2015. "substratum thesaurus" https://smartdefine.org/substratum/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, substratum thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/substratum/thesaurus/synonyms>.
MLASmart Define. "substratum thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/substratum/thesaurus/synonyms>