keep out vs prevent

keep out and prevent both are verbs.

Word	Noun	Adjective	Verb	Adverb
keep out	No	No	Yes	No
prevent	No	No	Yes	No

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

keep out: prevent from entering; shut out
prevent: stop (someone or something) from doing something or being in a certain state

Other hypernyms of keep out include keep.

keep out (verb)	prevent (verb)
remain outside	stop (someone or something) from doing something or being in a certain state
prevent from entering; shut out	keep from happening or arising; make impossible