Black Hills vs South Dakota

Black Hills and South Dakota both are nouns.

Word	Noun	Adjective	Verb	Adverb
Black Hills	Yes	No	No	No
South Dakota	Yes	No	No	No

Black Hills (noun)	South Dakota (noun)
mountains in southwestern South Dakota and northeastern Wyoming; sacred to the Sioux (whites settling in the Black Hills led to the Battle of Little Bighorn); site of Mount Rushmore	a state in north central United States