155 entries under noun topic. ×

1
pith(cause, idea, base, essence)
1
prime mover(expression, idiom, cause, reason)
1
producer(cause, reason, base, element)
1
provenance(cause, source, spring, origin)
1
provenience(cause, source, spring, origin)
1
provocation
1
purpose(cause, reason, object, element)
1
quick(cause, source, root, origin)
1
quintessence(cause, base, source, ground)
1
radicle(cause, quick, source, root)
1
radix(cause, quick, source, root)
1
rhizome(cause, quick, source, root)
1
rock bottom(expression, cause, quick, origin)
1
seed(cause, connection, source, origin)
1
soul(cause, base, source, ground)
1
starting point(expression, cause, quick, root)
1
stimulation(reason, element, matter, source)
1
stuff(cause, base, source, ground)
1
substance(cause, idea, base, essence)
0
account(reason, element, matter, source)
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APASmart Define. (2015). mainspring thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/mainspring/thesaurus/synonyms
ChicagoSmart Define. 2015. "mainspring thesaurus" https://smartdefine.org/mainspring/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, mainspring thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/mainspring/thesaurus/synonyms>.
MLASmart Define. "mainspring thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/mainspring/thesaurus/synonyms>