Goidelic vs Gaelic language

Goidelic and Gaelic language both are nouns.

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

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

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

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

Goidelic (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