soliloquy vs language

soliloquy and language both are nouns.

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

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

soliloquy (noun)	language (noun)
speech you make to yourself	the mental faculty or power of vocal communication
a (usually long) dramatic speech intended to give the illusion of unspoken reflections	the cognitive processes involved in producing and understanding linguistic communication
	a systematic means of communicating by the use of sounds or conventional symbols
	(language) communication by word of mouth
	the text of a popular song or musical-comedy number
	a system of words used to name things in a particular discipline