Faux pas is a noun.
for example "this jacket is made out of faux fox fur", the word 'faux' means false, untrue, unreal in french Are you faux real?
"faux / fausse" is the common translation of 'wrong' in French.
These are faux pearls, I can't afford the real thing, but they go well with my faux designer dress.
There is no difference. Faux fur just sounds better. "Faux" is the French word for "false".
The plurals of 'faux' is 'faux' (unchanged spelling). The feminine adjective (fausse) has an additional 's' when plural: fausses.
SNAFUs or mistakes are two that come to mind. So do blunders, missteps, and faux pas.
The word faux pas (open spaced compound noun) is an abstract noun, a word for something embarrasing said or done in a social situation. The word faux pas is a common noun; the form faux pas is both singular and plural.
'Faux pas' is French for 'wrong step' or 'misstep'- originally a ballet term (France was the cultural center of Europe for centuries). Its present English meaning is - a social blunder, a violation of commonly accepted etiquette norms.
Faux.
mock or faux
faux silk