Basseterre vs national capital

Basseterre and national capital both are nouns.

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

Basseterre (noun)	national capital (noun)
the capital of Saint Kitts and Nevis on the island of Saint Christopher	the capital city of a nation