opera vs comic opera

opera and comic opera both are nouns.

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

As nouns, comic opera is a hyponym of opera; that is, comic opera 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
comic opera: opera with a happy ending and in which some of the text is spoken

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

opera (noun)	comic opera (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