inquisition vs interrogation

inquisition and interrogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
inquisition	Yes	No	No	No
interrogation	Yes	No	No	No

As nouns, interrogation is a hypernym of inquisition; that is, interrogation is a word with a broader meaning than inquisition:

inquisition: a severe interrogation (often violating the rights or privacy of individuals)
interrogation: formal systematic questioning

Other hypernyms of inquisition include examination, interrogatory.

inquisition (noun)	interrogation (noun)
a severe interrogation (often violating the rights or privacy of individuals)	formal systematic questioning
	a sentence of inquiry that asks for a reply
	an instance of questioning
	a transmission that will trigger an answering transmission from a transponder