film director vs film maker

film director and film maker both are nouns.

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

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

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

film director (noun)	film maker (noun)
the person who directs the making of a film	a producer of motion pictures