silent picture vs pic

silent picture and pic both are nouns.

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

As nouns, pic is a hypernym of silent picture; that is, pic is a word with a broader meaning than silent picture:

silent picture: a movie without a soundtrack
pic: a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement

silent picture (noun)	pic (noun)
a movie without a soundtrack	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