prevent vs keep away

prevent and keep away both are verbs.

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

As verbs, keep away is a hyponym of prevent; that is, keep away is a word with a more specific, narrower meaning than prevent:

prevent: stop (someone or something) from doing something or being in a certain state
keep away: prevent from coming close

Other hyponyms of prevent include defend, exclude, keep out, shut, shut out, restrict, hold, restrain, blank, hinder, impede, rain out, wash out.

prevent (verb)	keep away (verb)
stop (someone or something) from doing something or being in a certain state	prevent from coming close
keep from happening or arising; make impossible