0
pitch(noun, start, beginning, opening, introduction)
0
pith(cause, source, origin)
0
place
0
psyche
0
query
0
quick(cause, source, origin, stem)
0
quintessence(cause, source, origin)
0
radiation source(expression, idiom)
0
radicle(cause, quick, source, origin, stem)
0
radix(cause, quick, source, origin, stem)
0
reason(cause, source, origin)
0
remote
0
remote cause(expression, idiom, cause)
0
rhizome(cause, quick, source, origin, stem)
0
rising(cause, foundation, basis)
0
river source(expression, idiom)
0
rooter
0
rote
0
salsify
0
school principal(expression, idiom)
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APASmart Define. (2015). fountainhead thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fountainhead/thesaurus/synonyms
ChicagoSmart Define. 2015. "fountainhead thesaurus" https://smartdefine.org/fountainhead/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, fountainhead thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fountainhead/thesaurus/synonyms>.
MLASmart Define. "fountainhead thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/fountainhead/thesaurus/synonyms>