goggle box vs telly

goggle box and telly both are nouns.

Word	Noun	Adjective	Verb	Adverb
goggle box	Yes	No	No	No
telly	Yes	No	No	No

As nouns, goggle box and telly are synonyms defined as:

goggle box and telly: an electronic device that receives television signals and displays them on a screen

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

goggle box (noun)	telly (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