hyalin vs keratohyalin

hyalin and keratohyalin both are nouns.

Word	Noun	Adjective	Verb	Adverb
hyalin	Yes	No	No	No
keratohyalin	Yes	No	No	No

As nouns, keratohyalin is a hyponym of hyalin; that is, keratohyalin is a word with a more specific, narrower meaning than hyalin:

hyalin: a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions
keratohyalin: hyaline in the large granules of the stratum granulosum

hyalin (noun)	keratohyalin (noun)
a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions	hyaline in the large granules of the stratum granulosum