revetment vs revetement

revetment and revetement both are nouns.

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

As nouns, revetment and revetement are synonyms defined as:

revetment and revetement: a facing (usually masonry) that supports an embankment

Other synonyms of revetment include stone facing.

revetment (noun)	revetement (noun)
a facing (usually masonry) that supports an embankment	a facing (usually masonry) that supports an embankment
a barrier against explosives