motion picture vs moving picture

motion picture and moving picture both are nouns.

Word	Noun	Adjective	Verb	Adverb
motion picture	Yes	No	No	No
moving picture	Yes	No	No	No

As nouns, motion picture and moving picture are synonyms defined as:

motion picture and moving picture: a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement

Other synonyms of motion picture include film, flick, motion-picture show, movie, moving-picture show, pic, picture, picture show.

motion picture (noun)	moving picture (noun)
a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement	a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement