lesion vs stigmata

lesion and stigmata both are nouns.

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

As nouns, stigmata is a hyponym of lesion; that is, stigmata 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)
stigmata: marks resembling the wounds on the crucified body of Christ

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

lesion (noun)	stigmata (noun)
any localized abnormal structural change in a bodily part	marks resembling the wounds on the crucified body of Christ
an injury to living tissue (especially an injury involving a cut or break in the skin)