Erse vs Gaelic language

Erse and Gaelic language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Erse	Yes	No	No	No
Gaelic language	Yes	No	No	No

As nouns, Erse and Gaelic language are synonyms defined as:

Erse and Gaelic language: any of several related languages of the Celts in Ireland and Scotland

Other synonyms of Erse include Erse language, Gaelic, Goidelic, Goidelic language.

Erse (noun)	Gaelic language (noun)
any of several related languages of the Celts in Ireland and Scotland	any of several related languages of the Celts in Ireland and Scotland