Finnish capital vs capital of Finland

Finnish capital and capital of Finland both are nouns.

Word	Noun	Adjective	Verb	Adverb
Finnish capital	Yes	No	No	No
capital of Finland	Yes	No	No	No

As nouns, Finnish capital and capital of Finland are synonyms defined as:

Finnish capital and capital of Finland: the capital and largest city of Finland; located in southern Finland; a major port and commercial and cultural center

Other synonyms of Finnish capital include Helsingfors, Helsinki.

Finnish capital (noun)	capital of Finland (noun)
the capital and largest city of Finland; located in southern Finland; a major port and commercial and cultural center	the capital and largest city of Finland; located in southern Finland; a major port and commercial and cultural center