goggle box vs receiving system

goggle box and receiving system both are nouns.

Word	Noun	Adjective	Verb	Adverb
goggle box	Yes	No	No	No
receiving system	Yes	No	No	No

As nouns, receiving system is a hypernym of goggle box; that is, receiving system is a word with a broader meaning than goggle box:

goggle box: an electronic device that receives television signals and displays them on a screen
receiving system: set that receives radio or tv signals

Other hypernyms of goggle box include receiver.

goggle box (noun)	receiving system (noun)
an electronic device that receives television signals and displays them on a screen	set that receives radio or tv signals