3D vs pic

3D and pic both are nouns.

Word	Noun	Adjective	Verb	Adverb
3D	Yes	No	No	No
pic	Yes	No	No	No

As nouns, pic is a hypernym of 3D; that is, pic is a word with a broader meaning than 3D:

3D: a movie with images having three dimensional form or appearance
pic: a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement

3D (noun)	pic (noun)
having a three-dimensional form or appearance	a representation of a person or scene in the form of a print or transparent slide or in digital format
a movie with images having three dimensional form or appearance	a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement