discussion vs language

discussion and language both are nouns.

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

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

discussion (noun)	language (noun)
an exchange of views on some topic	the mental faculty or power of vocal communication
an extended communication (often interactive) dealing with some particular topic	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