lesion vs excoriation

lesion and excoriation both are nouns.

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

As nouns, excoriation is a hyponym of lesion; that is, excoriation 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)
excoriation: an abraded area where the skin is torn or worn off

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

lesion (noun)	excoriation (noun)
any localized abnormal structural change in a bodily part	severe censure
an injury to living tissue (especially an injury involving a cut or break in the skin)	an abraded area where the skin is torn or worn off