broadcast vs news show

broadcast and news show both are nouns.

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

As nouns, news show is a hyponym of broadcast; that is, news show is a word with a more specific, narrower meaning than broadcast:

broadcast: a radio or television show
news show: a program devoted to current events, often using interviews and commentary

broadcast (noun)	news show (noun)
message that is transmitted by radio or television	a program devoted to current events, often using interviews and commentary
a radio or television show

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