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well(noun, pit, excavation, coalfield, coalmine)
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wellspring(noun, pit, excavation, coalfield, coalmine)
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work
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APASmart Define. (2015). colliery thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/colliery/thesaurus/synonyms
ChicagoSmart Define. 2015. "colliery thesaurus" https://smartdefine.org/colliery/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, colliery thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/colliery/thesaurus/synonyms>.
MLASmart Define. "colliery thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/colliery/thesaurus/synonyms>