peel vs banana skin

peel and banana skin both are nouns.

Word	Noun	Adjective	Verb	Adverb
peel	Yes	No	Yes	No
banana skin	Yes	No	No	No

As nouns, banana skin is a hyponym of peel; that is, banana skin is a word with a more specific, narrower meaning than peel:

peel: the rind of a fruit or vegetable
banana skin: the skin of a banana (especially when it is stripped off and discarded)

Other hyponyms of peel include jacket, banana peel, lemon peel, lemon rind, orange peel, orange rind.

peel (noun)	banana skin (noun)
the rind of a fruit or vegetable	the skin of a banana (especially when it is stripped off and discarded)

peel (verb)	banana skin (verb)
get undressed
remove the skin from
come off in flakes or thin small pieces