lookout vs watcher

lookout and watcher both are nouns.

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

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

Other hypernyms of lookout include security guard, watchman.

lookout (noun)	watcher (noun)
the act of looking out	a guard who keeps watch
a structure commanding a wide view of its surroundings	a close observer; someone who looks at something (such as an exhibition of some kind)
an elevated post affording a wide view	a person who keeps a devotional vigil by a sick bed or by a dead body
a person employed to keep watch for some anticipated event