national capital vs capital of Peru

national capital and capital of Peru both are nouns.

Word	Noun	Adjective	Verb	Adverb
national capital	Yes	No	No	No
capital of Peru	Yes	No	No	No

national capital (noun)	capital of Peru (noun)
the capital city of a nation	capital and largest city and economic center of Peru; located in western Peru; was capital of the Spanish empire in the New World until the 19th century