facing vs stone facing

facing and stone facing both are nouns.

Word	Noun	Adjective	Verb	Adverb
facing	Yes	No	No	No
stone facing	Yes	No	No	No

As nouns, stone facing is a hyponym of facing; that is, stone facing is a word with a more specific, narrower meaning than facing:

Other hyponyms of facing include revetement, revetment.

facing (noun)	stone facing (noun)
providing something with a surface of a different material	a facing (usually masonry) that supports an embankment
a protective covering that protects the outside of a building
a lining applied to the edge of a garment for ornamentation or strengthening
an ornamental coating to a building