monologue vs monologuize

monologue is a noun but monologuize is not a noun.

Word	Noun	Adjective	Verb	Adverb
monologue	Yes	No	No	No
monologuize	No	No	Yes	No

monologue (noun)	monologuize (noun)
speech you make to yourself
a (usually long) dramatic speech by a single actor
a long utterance by one person (especially one that prevents others from participating in the conversation)

monologue (verb)	monologuize (verb)
	talk to oneself