cable vs TV

cable and TV both are nouns.

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

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

Other hypernyms of cable include telecasting, television, video.

cable (noun)	TV (noun)
a very strong thick rope made of twisted hemp or steel wire	broadcasting visual images of stationary or moving objects
a television system that transmits over cables
a conductor for transmitting electrical or optical signals or electric power
a telegram sent abroad
television that is transmitted over cable directly to the receiver
a nautical unit of depth

cable (verb)	TV (verb)
send cables, wires, or telegrams
fasten with a cable