filmmaker vs film maker

filmmaker and film maker both are nouns.

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

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

Other synonyms of filmmaker include film producer, movie maker.

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