facing vs revetement

facing and revetement both are nouns.

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

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

Other hyponyms of facing include revetment, stone facing.

facing (noun)	revetement (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