idiot box vs tv

idiot box and tv both are nouns.

Word	Noun	Adjective	Verb	Adverb
idiot box	Yes	No	No	No
tv	Yes	No	No	No

As nouns, idiot box and tv are synonyms defined as:

idiot box and tv: an electronic device that receives television signals and displays them on a screen

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

idiot box (noun)	tv (noun)
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