pic vs motion picture

pic and motion picture both are nouns.

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

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

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

pic (noun)	motion picture (noun)
a representation of a person or scene in the form of a print or transparent slide or in digital format	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