capital of Norway vs Oslo

capital of Norway and Oslo both are nouns.

Word	Noun	Adjective	Verb	Adverb
capital of Norway	Yes	No	No	No
Oslo	Yes	No	No	No

As nouns, capital of Norway and Oslo are synonyms defined as:

capital of Norway and Oslo: the capital and largest city of Norway; the country's main port; located at the head of a fjord on Norway's southern coast

Other synonyms of capital of Norway include Christiania.

capital of Norway (noun)	Oslo (noun)
the capital and largest city of Norway; the country's main port; located at the head of a fjord on Norway's southern coast	the capital and largest city of Norway; the country's main port; located at the head of a fjord on Norway's southern coast