monologue vs words

monologue and words both are nouns.

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

As nouns, words is a hypernym of monologue; that is, words is a word with a broader meaning than monologue:

Other hypernyms of monologue include actor's line, speech.

monologue (noun)	words (noun)
speech you make to yourself	words making up the dialogue of a play
a (usually long) dramatic speech by a single actor	an angry dispute
a long utterance by one person (especially one that prevents others from participating in the conversation)	the text of a popular song or musical-comedy number
	the words that are spoken
	language that is spoken or written