Synonyms|237Antonyms|13|Broader|10Narrower|0Related|88

70 entries under source topic. ×

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crux(cause, origin)
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essence(cause, origin)
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essentiality(cause, origin)
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footing(cause, quick, origin, stem)
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fundamental(cause, quick, origin, stem)
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ground(cause, origin)
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groundwork(cause, quick, origin, stem)
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heart(cause, origin)
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impetus
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infrastructure(cause, quick, origin, stem)
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marrow(cause, origin)
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nub(cause, origin)
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pith(cause, origin)
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quick(cause, origin, stem)
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quintessence(cause, origin)
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radicle(cause, quick, origin, stem)
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radix(cause, quick, origin, stem)
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reason(cause, origin)
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rhizome(cause, quick, origin, stem)
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seat(cause, quick, origin, stem)
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APASmart Define. (2015). fountainhead thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fountainhead/thesaurus/synonyms
ChicagoSmart Define. 2015. "fountainhead thesaurus" https://smartdefine.org/fountainhead/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, fountainhead thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fountainhead/thesaurus/synonyms>.
MLASmart Define. "fountainhead thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/fountainhead/thesaurus/synonyms>