Chippewyan vs Athapaskan

Chippewyan and Athapaskan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Chippewyan	Yes	No	No	No
Athapaskan	Yes	No	No	No

As nouns, Athapaskan is a hypernym of Chippewyan; that is, Athapaskan is a word with a broader meaning than Chippewyan:

Chippewyan: the language spoken by the Chipewyan
Athapaskan: a group of Amerindian languages (the name coined by an American anthropologist, Edward Sapir)

Other hypernyms of Chippewyan include Athabascan, Athabaskan, Athapascan, Athapaskan language.

Chippewyan (noun)	Athapaskan (noun)
the language spoken by the Chipewyan	a group of Amerindian languages (the name coined by an American anthropologist, Edward Sapir)
	a member of any of the North American Indian groups speaking an Athapaskan language and living in the subarctic regions of western Canada and central Alaska