Karelian vs Russian

Karelian and Russian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Karelian	Yes	No	No	No
Russian	Yes	Yes	No	No

As nouns, Russian is a hypernym of Karelian; that is, Russian is a word with a broader meaning than Karelian:

Karelian: a member of the Finnish people living in Karelia in northwestern European Russia
Russian: a native or inhabitant of Russia

Karelian (noun)	Russian (noun)
a Finnic language spoken by the people of Karelia	the Slavic language that is the official language of Russia
a member of the Finnish people living in Karelia in northwestern European Russia	a native or inhabitant of Russia

Karelian (adjective)	Russian (adjective)
	of or pertaining to or characteristic of Russia or its people or culture or language