TV channel vs TV station

TV channel and TV station both are nouns.

Word	Noun	Adjective	Verb	Adverb
TV channel	Yes	No	No	No
TV station	Yes	No	No	No

As nouns, TV station is a hypernym of TV channel; that is, TV station is a word with a broader meaning than TV channel:

TV channel: a television station and its programs
TV station: station for the production and transmission of television broadcasts

Other hypernyms of TV channel include television station.

TV channel (noun)	TV station (noun)
a television station and its programs	station for the production and transmission of television broadcasts