lesion vs abrasion

lesion and abrasion both are nouns.

Word	Noun	Adjective	Verb	Adverb
lesion	Yes	No	No	No
abrasion	Yes	No	No	No

As nouns, abrasion is a hyponym of lesion; that is, abrasion is a word with a more specific, narrower meaning than lesion:

lesion: an injury to living tissue (especially an injury involving a cut or break in the skin)
abrasion: an abraded area where the skin is torn or worn off

Other hyponyms of lesion include raw wound, stigmata, excoriation, scrape, scratch, cut, gash, slash, slice, laceration, bite.

lesion (noun)	abrasion (noun)
any localized abnormal structural change in a bodily part	the wearing down of rock particles by friction due to water or wind or ice
an injury to living tissue (especially an injury involving a cut or break in the skin)	erosion by friction
	an abraded area where the skin is torn or worn off