television vs boob tube

television and boob tube both are nouns.

Word	Noun	Adjective	Verb	Adverb
television	Yes	No	No	No
boob tube	Yes	No	No	No

As nouns, television and boob tube are synonyms defined as:

television and boob tube: an electronic device that receives television signals and displays them on a screen

Other synonyms of television include goggle box, idiot box, television receiver, television set, telly, tv, tv set.

television (noun)	boob tube (noun)
a telecommunication system that transmits images of objects (stationary or moving) between distant points	an electronic device that receives television signals and displays them on a screen
an electronic device that receives television signals and displays them on a screen
broadcasting visual images of stationary or moving objects