broadcast vs telecast

broadcast and telecast both are nouns.

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

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

Other hyponyms of broadcast include rebroadcast, radio broadcast, simulcast, newscast.

As verbs, telecast is a hyponym of broadcast; that is, telecast is a word with a more specific, narrower meaning than broadcast:

Other hyponyms of broadcast include satellite, sportscast, televise, interrogate, rebroadcast, rerun.

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

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