game show vs broadcast

game show and broadcast both are nouns.

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

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

game show: a television or radio program in which contestants compete for awards
broadcast: a radio or television show

Other hypernyms of game show include program, programme.

game show (noun)	broadcast (noun)
a television or radio program in which contestants compete for awards	message that is transmitted by radio or television
	a radio or television show

game 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