Inquisitor vs inquisitorial

Inquisitor is a noun but inquisitorial is not a noun.

Word	Noun	Adjective	Verb	Adverb
Inquisitor	Yes	No	No	No
inquisitorial	No	Yes	No	No

Inquisitor (noun)	inquisitorial (noun)
an official of the ecclesiastical court of the Inquisition

Inquisitor (adjective)	inquisitorial (adjective)
	especially indicating a form of prosecution in which proceedings are secret and the accused is questioned by a prosecutor who acts also as the judge
	having the authority to conduct official investigations
	marked by inquisitive interest; especially suggestive of an ecclesiastical inquisitor