Bluegrass Region vs Bluegrass

Bluegrass Region and Bluegrass both are nouns.

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

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

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

Other synonyms of Bluegrass Region include Bluegrass Country.

Bluegrass Region (noun)	Bluegrass (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