ceratin vs keratin

ceratin and keratin both are nouns.

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

As nouns, ceratin and keratin are synonyms defined as:

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

ceratin (noun)	keratin (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