wear upon vs wear out

wear upon and wear out both are verbs.

Word	Noun	Adjective	Verb	Adverb
wear upon	No	No	Yes	No
wear out	No	No	Yes	No

As verbs, wear upon and wear out are synonyms defined as:

wear upon and wear out: exhaust or get tired through overuse or great strain or stress

Other synonyms of wear upon include fag, fag out, fatigue, jade, outwear, tire, tire out, wear, wear down, weary.

wear upon (verb)	wear out (verb)
exhaust or get tired through overuse or great strain or stress	exhaust or get tired through overuse or great strain or stress
	deteriorate through use or stress
	go to pieces