television show vs broadcast

television show and broadcast both are nouns.

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

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

Other hypernyms of television show include program, programme.

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

television 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