mortal vs radical

mortal and radical both are nouns.

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

mortal (noun)	radical (noun)
a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential	a character conveying the lexical meaning of a logogram
	(linguistics) the form of a word after all affixes are removed
	a person who has radical ideas or opinions
	(mathematics) a quantity expressed as the root of another quantity
	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
	an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule

mortal (adjective)	radical (adjective)
subject to death	especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem
unrelenting and deadly	of or relating to or constituting a linguistic root
involving loss of divine grace or spiritual death	arising from or going to the root or source
causing or capable of causing death	(used of opinions and actions) far beyond the norm
	markedly new or introducing radical change