Synonyms|84Antonyms|0|Broader|0Narrower|0Related|0
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turning point(expression, reason, importance, significance)
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ultimate cause(expression, reason, importance, significance)
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underlying cause(expression, reason, importance, significance)
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upstream cause(expression, reason, importance, significance)
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APASmart Define. (1970). fundamental reason thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fundamental_reason/thesaurus/synonyms
ChicagoSmart Define. 1970. "fundamental reason thesaurus" https://smartdefine.org/fundamental_reason/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 1970, fundamental reason thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fundamental_reason/thesaurus/synonyms>.
MLASmart Define. "fundamental reason thesaurus" 1 January 1970. Web. 26 September 2026. <https://smartdefine.org/fundamental_reason/thesaurus/synonyms>