movie vs musical comedy

movie and musical comedy both are nouns.

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

As nouns, musical comedy is a hyponym of movie; that is, musical comedy is a word with a more specific, narrower meaning than movie:

movie: a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement
musical comedy: a play or film whose action and dialogue is interspersed with singing and dancing

movie (noun)	musical comedy (noun)
a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement	a play or film whose action and dialogue is interspersed with singing and dancing