mortal vs earthborn

mortal is a noun but earthborn is not a noun.

Word	Noun	Adjective	Verb	Adverb
mortal	Yes	Yes	No	No
earthborn	No	Yes	No	No

mortal (noun)	earthborn (noun)
a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential

mortal (adjective)	earthborn (adjective)
subject to death	connected with earthly life; of earthly origin
unrelenting and deadly	springing from or born on the earth
involving loss of divine grace or spiritual death	of earthly origin (as mortals are)
causing or capable of causing death