archangel vs archangelical

archangel is a noun but archangelical is not a noun.

Word	Noun	Adjective	Verb	Adverb
archangel	Yes	No	No	No
archangelical	No	Yes	No	No

archangel (noun)	archangelical (noun)
an angel ranked above the highest rank in the celestial hierarchy
a biennial cultivated herb; its stems are candied and eaten and its roots are used medicinally

archangel (adjective)	archangelical (adjective)
	of or relating to or resembling archangels