film maker vs filmmaker

film maker and filmmaker both are nouns.

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

As nouns, film maker and filmmaker are synonyms defined as:

Other synonyms of film maker include film producer, movie maker.

film maker (noun)	filmmaker (noun)
a producer of motion pictures	a producer of motion pictures