national capital vs capital of Syria

national capital and capital of Syria both are nouns.

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

national capital (noun)	capital of Syria (noun)
the capital city of a nation	an ancient city (widely regarded as the world's oldest) and present capital and one of the largest cities of Syria; according to the New Testament, the Apostle Paul (then known as Saul) underwent a dramatic conversion on the road to Damascus