mug shot vs pic

mug shot and pic both are nouns.

Word	Noun	Adjective	Verb	Adverb
mug shot	Yes	No	No	No
pic	Yes	No	No	No

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

mug shot: a photograph of someone's face (especially one made for police records)
pic: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other hypernyms of mug shot include exposure, photo, photograph, picture.

mug shot (noun)	pic (noun)
a photograph of someone's face (especially one made for police records)	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