wear away vs abrase

wear away and abrase both are verbs.

Word	Noun	Adjective	Verb	Adverb
wear away	No	No	Yes	No
abrase	No	No	Yes	No

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

Other hyponyms of wear away include abrade, corrade, rub down, rub off.

wear away (verb)	abrase (verb)
become ground down or deteriorate	wear away
diminish, as by friction
cut away in small pieces