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headwater

noun

Synonyms of headwater

usually headwaters plural the beginning part of a stream
  • the first exploration of the Missouri River from its mouth to its headwaters was made by Meriwether Lewis and William Clark in the early 1800s

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The first known use of headwater was in 1612

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“Headwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/headwater. Accessed 18 Sep. 2020.

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