musical comedy vs musical theater

musical comedy and musical theater both are nouns.

Word	Noun	Adjective	Verb	Adverb
musical comedy	Yes	No	No	No
musical theater	Yes	No	No	No

As nouns, musical comedy and musical theater are synonyms defined as:

musical comedy and musical theater: a play or film whose action and dialogue is interspersed with singing and dancing

Other synonyms of musical comedy include musical.

musical comedy (noun)	musical theater (noun)
a play or film whose action and dialogue is interspersed with singing and dancing	a play or film whose action and dialogue is interspersed with singing and dancing