Susian vs natural language

Susian and natural language both are nouns.

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

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

Susian: an extinct ancient language of unknown affinities; spoken by the Elamites
natural language: a human written or spoken language used by a community; opposed to e.g. a computer language

Other hypernyms of Susian include tongue.

Susian (noun)	natural language (noun)
an extinct ancient language of unknown affinities; spoken by the Elamites	a human written or spoken language used by a community; opposed to e.g. a computer language