122 entries under base topic. ×

7
substance(noun, quality, feeling, cause, start)
7
underpinning(noun, support, cause, start, substance)
6
quintessence(noun, quality, feeling, cause, start)
6
soul(noun, quality, cause, start, character)
6
source(noun, cause, start, beginning)
6
stuff(noun, quality, feeling, cause, start)
6
substratum(noun, support, cause, start, substance)
6
substructure(noun, support, low, substance, rest)
6
support(noun, verb, hold, maintain, substance)
5
origin(noun, cause, source, core)
5
bedrock(noun, support, cause, start, substance)
5
end(noun, back, top, handle)
5
marrow(noun, quality, feeling, cause, start)
5
nub(noun, adjective, quality, cause, start)
5
pith(noun, quality, feeling, cause, start)
5
understructure(noun, substance, balance, foundation)
4
essentiality(noun, nature, quality, cause, start)
4
rock bottom(noun, expression, high, quick)
3
core(noun, adjective, quality, cause, start)
3
establish(verb, support, stay, build)
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APASmart Define. (2016). bottom thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/bottom/thesaurus/synonyms
ChicagoSmart Define. 2016. "bottom thesaurus" https://smartdefine.org/bottom/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, bottom thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/bottom/thesaurus/synonyms>.
MLASmart Define. "bottom thesaurus" 2 March 2016. Web. 21 September 2026. <https://smartdefine.org/bottom/thesaurus/synonyms>