avert vs preclude

avert and preclude both are verbs.

Word	Noun	Adjective	Verb	Adverb
avert	No	No	Yes	No
preclude	No	No	Yes	No

As verbs, preclude is a hypernym of avert; that is, preclude is a word with a broader meaning than avert:

avert: prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off
preclude: keep from happening or arising; make impossible

Other hypernyms of avert include forbid, foreclose, forestall, prevent.

avert (verb)	preclude (verb)
turn away or aside	keep from happening or arising; make impossible
prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off	make impossible, especially beforehand