Elamitic vs Susian

Elamitic and Susian both are nouns.

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

As nouns, Elamitic and Susian are synonyms defined as:

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

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

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