mortal vs unpardonable

mortal is a noun but unpardonable is not a noun.

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

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

mortal (adjective)	unpardonable (adjective)
subject to death	not admitting of pardon
unrelenting and deadly
involving loss of divine grace or spiritual death
causing or capable of causing death