horny layer vs stratum corneum

horny layer and stratum corneum both are nouns.

Word	Noun	Adjective	Verb	Adverb
horny layer	Yes	No	No	No
stratum corneum	Yes	No	No	No

As nouns, horny layer and stratum corneum are synonyms defined as:

horny layer and stratum corneum: the outermost layer of the epidermis consisting of dead cells that slough off

Other synonyms of horny layer include corneum.

horny layer (noun)	stratum corneum (noun)
the outermost layer of the epidermis consisting of dead cells that slough off	the outermost layer of the epidermis consisting of dead cells that slough off