faubourg vs suburbia

faubourg and suburbia both are nouns.

Word	Noun	Adjective	Verb	Adverb
faubourg	Yes	No	No	No
suburbia	Yes	No	No	No

As nouns, suburbia is a hypernym of faubourg; that is, suburbia is a word with a broader meaning than faubourg:

faubourg: a New Orleans district lying outside the original city limits; used in combination with the names of various quarters of the city
suburbia: a residential district located on the outskirts of a city

Other hypernyms of faubourg include suburb, suburban area.

faubourg (noun)	suburbia (noun)
a New Orleans district lying outside the original city limits; used in combination with the names of various quarters of the city	suburbanites considered as a cultural class or subculture
	a residential district located on the outskirts of a city