forget vs leave out

forget and leave out both are verbs.

Word	Noun	Adjective	Verb	Adverb
forget	No	No	Yes	No
leave out	No	No	Yes	No

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

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

forget (verb)	leave out (verb)
be unable to remember	leave undone or leave out
dismiss from the mind; stop remembering	prevent from being included or considered or accepted
leave behind unintentionally
forget to do something