monarch vs monarchal

monarch is a noun but monarchal is not a noun.

Word	Noun	Adjective	Verb	Adverb
monarch	Yes	No	No	No
monarchal	No	Yes	No	No

monarch (noun)	monarchal (noun)
large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
a nation's ruler or head of state usually by hereditary right

monarch (adjective)	monarchal (adjective)
	having the characteristics of or befitting or worthy of a monarch
	ruled by or having the supreme power resting with a monarch