wear away vs abrade

wear away and abrade both are verbs.

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

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

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

wear away (verb)	abrade (verb)
become ground down or deteriorate	wear away
diminish, as by friction	rub hard or scrub
cut away in small pieces