faux pas vs gaucherie

faux pas and gaucherie both are nouns.

Word	Noun	Adjective	Verb	Adverb
faux pas	Yes	No	No	No
gaucherie	Yes	No	No	No

As nouns, faux pas and gaucherie are synonyms defined as:

Other synonyms of faux pas include gaffe, slip, solecism.

faux pas (noun)	gaucherie (noun)
a socially awkward or tactless act	a socially awkward or tactless act
	the quality of being rustic or gauche