middle class vs bourgeoisie

middle class and bourgeoisie both are nouns.

Word	Noun	Adjective	Verb	Adverb
middle class	Yes	No	No	No
bourgeoisie	Yes	No	No	No

As nouns, middle class and bourgeoisie are synonyms defined as:

middle class and bourgeoisie: the social class between the lower and upper classes

middle class (noun)	bourgeoisie (noun)
the social class between the lower and upper classes	the social class between the lower and upper classes