Susian language vs Elamitic

Susian language and Elamitic both are nouns.

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

As nouns, Susian language and Elamitic are synonyms defined as:

Susian language and Elamitic: an extinct ancient language of unknown affinities; spoken by the Elamites

Other synonyms of Susian language include Elamite, Elamite language, Elamitic language, Susian.

Susian language (noun)	Elamitic (noun)
an extinct ancient language of unknown affinities; spoken by the Elamites	an extinct ancient language of unknown affinities; spoken by the Elamites