Mordvin vs Mordva language

Mordvin and Mordva language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mordvin	Yes	No	No	No
Mordva language	Yes	No	No	No

As nouns, Mordvin and Mordva language are synonyms defined as:

Mordvin and Mordva language: the Finnic language spoken by the Mordvinians

Other synonyms of Mordvin include Mordva, Mordvin language, Mordvinian, Mordvinian language.

Mordvin (noun)	Mordva language (noun)
the Finnic language spoken by the Mordvinians	the Finnic language spoken by the Mordvinians
a member of the agricultural people living in the central Volga provinces of European Russia