forget vs overlook

forget is not a noun while overlook is a noun.

Word	Noun	Adjective	Verb	Adverb
forget	No	No	Yes	No
overlook	Yes	No	Yes	No

As verbs, overlook is a hypernym of forget; that is, overlook is a word with a broader meaning than forget:

Other hypernyms of forget include drop, leave out, miss, neglect, omit, overleap, pretermit.

forget (noun)	overlook (noun)
	a high place affording a good view

forget (verb)	overlook (verb)
be unable to remember	leave undone or leave out
dismiss from the mind; stop remembering	watch over
leave behind unintentionally	look past, fail to notice
forget to do something	look down on
	be oriented in a certain direction