Sorbian vs Lusatian language

Sorbian and Lusatian language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sorbian	Yes	No	No	No
Lusatian language	Yes	No	No	No

As nouns, Sorbian and Lusatian language are synonyms defined as:

Sorbian and Lusatian language: a Slavonic language spoken in rural area of southeastern Germany

Other synonyms of Sorbian include Lusatian, Sorbian language.

Sorbian (noun)	Lusatian language (noun)
a Slavonic language spoken in rural area of southeastern Germany	a Slavonic language spoken in rural area of southeastern Germany
a speaker of Sorbian