monologue vs monologist

monologue and monologist both are nouns.

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

monologue (noun)	monologist (noun)
speech you make to yourself	an entertainer who performs alone
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)