movie vs film noir

movie and film noir both are nouns.

Word	Noun	Adjective	Verb	Adverb
movie	Yes	No	No	No
film noir	Yes	No	No	No

As nouns, film noir is a hyponym of movie; that is, film noir 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
film noir: a movie that is marked by a mood of pessimism, fatalism, menace, and cynical characters

movie (noun)	film noir (noun)
a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement	a movie that is marked by a mood of pessimism, fatalism, menace, and cynical characters