TV show vs broadcast

TV show and broadcast both are nouns.

Word	Noun	Adjective	Verb	Adverb
TV show	Yes	No	No	No
broadcast	Yes	No	Yes	No

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

Other hypernyms of TV show include program, programme.

TV show (noun)	broadcast (noun)
a program broadcast by television	message that is transmitted by radio or television
	a radio or television show

TV show (verb)	broadcast (verb)
	cause to become widely known
	broadcast over the airwaves, as in radio or television
	sow over a wide area, especially by hand