televise vs broadcast

televise is not a noun while broadcast is a noun.

Word	Noun	Adjective	Verb	Adverb
televise	No	No	Yes	No
broadcast	Yes	No	Yes	No

As verbs, broadcast is a hypernym of televise; that is, broadcast is a word with a broader meaning than televise:

Other hypernyms of televise include air, beam, send, transmit.

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

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