keratin vs ceratin

keratin and ceratin both are nouns.

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

As nouns, keratin and ceratin are synonyms defined as:

keratin and ceratin: a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves

keratin (noun)	ceratin (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 fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves