cable television vs television

cable television and television both are nouns.

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

As nouns, television is a hypernym of cable television; that is, television is a word with a broader meaning than cable television:

cable television: a television system that transmits over cables
television: a telecommunication system that transmits images of objects (stationary or moving) between distant points

Other hypernyms of cable television include television system.

As nouns, television is a hypernym of cable television; that is, television is a word with a broader meaning than cable television:

cable television: television that is transmitted over cable directly to the receiver
television: broadcasting visual images of stationary or moving objects

Other hypernyms of cable television include telecasting, TV, video.

cable television (noun)	television (noun)
a television system that transmits over cables	a telecommunication system that transmits images of objects (stationary or moving) between distant points
television that is transmitted over cable directly to the receiver	an electronic device that receives television signals and displays them on a screen
	broadcasting visual images of stationary or moving objects