mortal vs earthly

mortal is a noun but earthly is not a noun.

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

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

mortal (adjective)	earthly (adjective)
subject to death	of or belonging to or characteristic of this earth as distinguished from heaven
unrelenting and deadly
involving loss of divine grace or spiritual death
causing or capable of causing death