Scandinavian vs North Germanic

Scandinavian and North Germanic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scandinavian	Yes	Yes	No	No
North Germanic	Yes	No	No	No

As nouns, Scandinavian and North Germanic are synonyms defined as:

Scandinavian and North Germanic: the northern family of Germanic languages that are spoken in Scandinavia and Iceland

Other synonyms of Scandinavian include Nordic, Norse, North Germanic language, Scandinavian language.

Scandinavian (noun)	North Germanic (noun)
the northern family of Germanic languages that are spoken in Scandinavia and Iceland	the northern family of Germanic languages that are spoken in Scandinavia and Iceland
an inhabitant of Scandinavia

Scandinavian (adjective)	North Germanic (adjective)
of or relating to Scandinavia or its peoples or cultures