Christiania vs capital of Norway

Christiania and capital of Norway both are nouns.

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

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

Christiania and capital of Norway: 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 Christiania include Oslo.

Christiania (noun)	capital of Norway (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