motion-picture fan vs viewer

motion-picture fan and viewer both are nouns.

Word	Noun	Adjective	Verb	Adverb
motion-picture fan	Yes	No	No	No
viewer	Yes	No	No	No

As nouns, viewer is a hypernym of motion-picture fan; that is, viewer is a word with a broader meaning than motion-picture fan:

motion-picture fan: someone who goes to see movies
viewer: a close observer; someone who looks at something (such as an exhibition of some kind)

Other hypernyms of motion-picture fan include looker, spectator, watcher, witness.

motion-picture fan (noun)	viewer (noun)
someone who goes to see movies	an optical device for viewing photographic transparencies
	a close observer; someone who looks at something (such as an exhibition of some kind)