flume vs watercourse

flume and watercourse both are nouns.

Word	Noun	Adjective	Verb	Adverb
flume	Yes	No	No	No
watercourse	Yes	No	No	No

As nouns, watercourse is a hypernym of flume; that is, watercourse is a word with a broader meaning than flume:

flume: watercourse that consists of an open artificial chute filled with water for power or for carrying logs
watercourse: a conduit through which water flows

Other hypernyms of flume include waterway.

flume (noun)	watercourse (noun)
watercourse that consists of an open artificial chute filled with water for power or for carrying logs	a conduit through which water flows
a narrow gorge with a stream running through it	a natural body of running water flowing on or under the earth
	natural or artificial channel through which water flows