stratum corneum vs horny layer

stratum corneum and horny layer both are nouns.

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

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

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

Other synonyms of stratum corneum include corneum.

stratum corneum (noun)	horny layer (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