director vs film maker

director and film maker both are nouns.

Word	Noun	Adjective	Verb	Adverb
director	Yes	No	No	No
film maker	Yes	No	No	No

As nouns, film maker is a hypernym of director; that is, film maker is a word with a broader meaning than director:

Other hypernyms of director include film producer, filmmaker, movie maker.

director (noun)	film maker (noun)
someone who controls resources and expenditures	a producer of motion pictures
the person who leads a musical group
someone who supervises the actors and directs the action in the production of a show
member of a board of directors
the person who directs the making of a film