Scandinavian vs European

Scandinavian and European both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scandinavian	Yes	Yes	No	No
European	Yes	Yes	No	No

As nouns, European is a hypernym of Scandinavian; that is, European is a word with a broader meaning than Scandinavian:

Scandinavian (noun)	European (noun)
the northern family of Germanic languages that are spoken in Scandinavia and Iceland	a native or inhabitant of Europe
an inhabitant of Scandinavia

Scandinavian (adjective)	European (adjective)
of or relating to Scandinavia or its peoples or cultures	of or relating to or characteristic of Europe or the people of Europe