capital of South Dakota vs Pierre

capital of South Dakota and Pierre both are nouns.

Word	Noun	Adjective	Verb	Adverb
capital of South Dakota	Yes	No	No	No
Pierre	Yes	No	No	No

As nouns, capital of South Dakota and Pierre are synonyms defined as:

capital of South Dakota and Pierre: capital of the state of South Dakota; located in central South Dakota on the Missouri river

capital of South Dakota (noun)	Pierre (noun)
capital of the state of South Dakota; located in central South Dakota on the Missouri river	capital of the state of South Dakota; located in central South Dakota on the Missouri river