opera vs bouffe

opera and bouffe both are nouns.

Word	Noun	Adjective	Verb	Adverb
opera	Yes	No	No	No
bouffe	Yes	No	No	No

As nouns, bouffe is a hyponym of opera; that is, bouffe is a word with a more specific, narrower meaning than opera:

opera: a drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes
bouffe: opera with a happy ending and in which some of the text is spoken

Other hyponyms of opera include rock opera, comic opera, opera bouffe, opera comique, grand opera, musical drama.

opera (noun)	bouffe (noun)
a building where musical dramas are performed	opera with a happy ending and in which some of the text is spoken
a drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes