make unnecessary vs preclude

make unnecessary and preclude both are verbs.

Word	Noun	Adjective	Verb	Adverb
make unnecessary	No	No	Yes	No
preclude	No	No	Yes	No

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

Other hypernyms of make unnecessary include forbid, foreclose, forestall, prevent.

make unnecessary (verb)	preclude (verb)
make unnecessary an expenditure or effort	keep from happening or arising; make impossible
	make impossible, especially beforehand