boob tube vs idiot box

boob tube and idiot box both are nouns.

Word	Noun	Adjective	Verb	Adverb
boob tube	Yes	No	No	No
idiot box	Yes	No	No	No

As nouns, boob tube and idiot box are synonyms defined as:

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

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

boob tube (noun)	idiot box (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