news vs television news

news and television news both are nouns.

Word	Noun	Adjective	Verb	Adverb
news	Yes	No	No	No
television news	Yes	No	No	No

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

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

news (noun)	television news (noun)
the quality of being sufficiently interesting to be reported in news bulletins	a television broadcast of news
information about recent and important events
information reported in a newspaper or news magazine
a program devoted to current events, often using interviews and commentary
informal information of any kind that is not previously known to someone