soliloquy vs words

soliloquy and words both are nouns.

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

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

soliloquy: a (usually long) dramatic speech intended to give the illusion of unspoken reflections
words: words making up the dialogue of a play

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

soliloquy (noun)	words (noun)
speech you make to yourself	words making up the dialogue of a play
a (usually long) dramatic speech intended to give the illusion of unspoken reflections	an angry dispute
	the text of a popular song or musical-comedy number
	the words that are spoken
	language that is spoken or written