national capital vs capital of Malawi

national capital and capital of Malawi both are nouns.

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

national capital (noun)	capital of Malawi (noun)
the capital city of a nation	the capital of Malawi; located in south central Malawi