wedding picture vs pic

wedding picture and pic both are nouns.

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

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

wedding picture: photographs of bride and groom and their friends taken at their wedding
pic: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other hypernyms of wedding picture include exposure, photo, photograph, picture.

wedding picture (noun)	pic (noun)
photographs of bride and groom and their friends taken at their wedding	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