national capital vs capital of Senegal

national capital and capital of Senegal both are nouns.

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

national capital (noun)	capital of Senegal (noun)
the capital city of a nation	the capital and chief port and largest city of Senegal