pic vs photo

pic and photo both are nouns.

Word	Noun	Adjective	Verb	Adverb
pic	Yes	No	No	No
photo	Yes	No	No	No

As nouns, pic and photo are synonyms defined as:

pic and photo: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other synonyms of pic include exposure, photograph, picture.

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