keratin vs scleroprotein

keratin and scleroprotein both are nouns.

Word	Noun	Adjective	Verb	Adverb
keratin	Yes	No	No	No
scleroprotein	Yes	No	No	No

As nouns, scleroprotein is a hypernym of keratin; that is, scleroprotein is a word with a broader meaning than keratin:

keratin: a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves
scleroprotein: a simple protein found in horny and cartilaginous tissues and in the lens of the eye

Other hypernyms of keratin include albuminoid.

keratin (noun)	scleroprotein (noun)
a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves	a simple protein found in horny and cartilaginous tissues and in the lens of the eye