Mt. Rushmore vs Black Hills

Mt. Rushmore and Black Hills both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mt. Rushmore	Yes	No	No	No
Black Hills	Yes	No	No	No

Mt. Rushmore (noun)	Black Hills (noun)
a mountain in the Black Hills of South Dakota; the likenesses of Washington and Jefferson and Lincoln and Roosevelt are carved on it	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