Bluegrass vs Bluegrass Country

Bluegrass and Bluegrass Country both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bluegrass	Yes	No	No	No
Bluegrass Country	Yes	No	No	No

As nouns, Bluegrass and Bluegrass Country are synonyms defined as:

Bluegrass and Bluegrass Country: an area in central Kentucky noted for its bluegrass and thoroughbred horses

Other synonyms of Bluegrass include Bluegrass Region.

Bluegrass (noun)	Bluegrass Country (noun)
an area in central Kentucky noted for its bluegrass and thoroughbred horses	an area in central Kentucky noted for its bluegrass and thoroughbred horses