Ankara vs national capital

Ankara and national capital both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ankara	Yes	No	No	No
national capital	Yes	No	No	No

Ankara (noun)	national capital (noun)
the capital of Turkey; located in west-central Turkey; it was formerly known as Angora and is the home of Angora goats	the capital city of a nation