toponymy vs language

toponymy and language both are nouns.

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

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

Other hypernyms of toponymy include nomenclature, terminology.

toponymy (noun)	language (noun)
the branch of lexicology that studies the place names of a region or a language	the mental faculty or power of vocal communication
the nomenclature of regional anatomy	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