interrogate vs interrogation

interrogate is not a noun while interrogation is a noun.

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

interrogate (noun)	interrogation (noun)
	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

interrogate (verb)	interrogation (verb)
pose a series of questions to
transmit (a signal) for setting off an appropriate response, as in telecommunication