monarchy vs monarchical

monarchy is a noun but monarchical is not a noun.

Word	Noun	Adjective	Verb	Adverb
monarchy	Yes	No	No	No
monarchical	No	Yes	No	No

monarchy (noun)	monarchical (noun)
an autocracy governed by a monarch who usually inherits the authority

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