lesion vs slash

lesion and slash both are nouns.

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

As nouns, slash is a hyponym of lesion; that is, slash 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)
slash: a wound made by cutting

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

lesion (noun)	slash (noun)
any localized abnormal structural change in a bodily part	a strong sweeping cut made with a sharp instrument
an injury to living tissue (especially an injury involving a cut or break in the skin)	a punctuation mark (/) used to separate related items of information
	an open tract of land in a forest that is strewn with debris from logging (or fire or wind)
	a wound made by cutting

lesion (verb)	slash (verb)
	cut drastically
	cut open
	cut with sweeping strokes; as with an ax or machete
	beat severely with a whip or rod
	move or stir about violently