San Jose vs national capital

San Jose and national capital both are nouns.

Word	Noun	Adjective	Verb	Adverb
San Jose	Yes	No	No	No
national capital	Yes	No	No	No

San Jose (noun)	national capital (noun)
the capital and largest city of Costa Rica	the capital city of a nation
a city in western California located at the southern end of San Francisco Bay to the south of San Francisco; a center for computer and electronics industries