Basque vs natural language

Basque and natural language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Basque	Yes	No	No	No
natural language	Yes	No	No	No

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

Basque: the language of the Basque people; of no known relation to any other language
natural language: a human written or spoken language used by a community; opposed to e.g. a computer language

Other hypernyms of Basque include tongue.

Basque (noun)	natural language (noun)
the language of the Basque people; of no known relation to any other language	a human written or spoken language used by a community; opposed to e.g. a computer language
a member of a people of unknown origin living in the western Pyrenees in France and Spain