North Germanic vs Scandinavian

North Germanic and Scandinavian both are nouns.

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

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

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

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

North Germanic (noun)	Scandinavian (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

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