moviegoer vs watcher

moviegoer and watcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
moviegoer	Yes	No	No	No
watcher	Yes	No	No	No

As nouns, watcher is a hypernym of moviegoer; that is, watcher is a word with a broader meaning than moviegoer:

moviegoer: someone who goes to see movies
watcher: a close observer; someone who looks at something (such as an exhibition of some kind)

Other hypernyms of moviegoer include looker, spectator, viewer, witness.

moviegoer (noun)	watcher (noun)
someone who goes to see movies	a guard who keeps watch
	a close observer; someone who looks at something (such as an exhibition of some kind)
	a person who keeps a devotional vigil by a sick bed or by a dead body