tv vs television receiver

tv and television receiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
tv	Yes	No	No	No
television receiver	Yes	No	No	No

As nouns, tv and television receiver are synonyms defined as:

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

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

tv (noun)	television receiver (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