Slavonic vs Slavonic language

Slavonic and Slavonic language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Slavonic	Yes	Yes	No	No
Slavonic language	Yes	No	No	No

As nouns, Slavonic and Slavonic language are synonyms defined as:

Slavonic and Slavonic language: a branch of the Indo-European family of languages

Other synonyms of Slavonic include Slavic, Slavic language.

Slavonic (noun)	Slavonic language (noun)
a branch of the Indo-European family of languages	a branch of the Indo-European family of languages

Slavonic (adjective)	Slavonic language (adjective)
of or relating to Slavic languages