Grand Inquisitor vs Inquisitor

Grand Inquisitor and Inquisitor both are nouns.

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

As nouns, Inquisitor is a hypernym of Grand Inquisitor; that is, Inquisitor is a word with a broader meaning than Grand Inquisitor:

Grand Inquisitor: director of the court of Inquisition (especially in Spain and Portugal)
Inquisitor: an official of the ecclesiastical court of the Inquisition

Grand Inquisitor (noun)	Inquisitor (noun)
director of the court of Inquisition (especially in Spain and Portugal)	an official of the ecclesiastical court of the Inquisition