Athapascan vs Apache

Athapascan and Apache both are nouns.

Word	Noun	Adjective	Verb	Adverb
Athapascan	Yes	No	No	No
Apache	Yes	No	No	No

As nouns, Apache is a hyponym of Athapascan; that is, Apache is a word with a more specific, narrower meaning than Athapascan:

Athapascan: a group of Amerindian languages (the name coined by an American anthropologist, Edward Sapir)
Apache: the language of the Apache

As nouns, Apache is a hyponym of Athapascan; that is, Apache is a word with a more specific, narrower meaning than Athapascan:

Athapascan: 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
Apache: any member of Athapaskan tribes that migrated to the southwestern desert (from Arizona to Texas and south into Mexico); fought a losing battle from 1861 to 1886 with the United States and were resettled in Oklahoma

Other hyponyms of Athapascan include Chipewyan, Hupa, Mattole, Navaho, Navajo.

Athapascan (noun)	Apache (noun)
a group of Amerindian languages (the name coined by an American anthropologist, Edward Sapir)	the language of the Apache
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	any member of Athapaskan tribes that migrated to the southwestern desert (from Arizona to Texas and south into Mexico); fought a losing battle from 1861 to 1886 with the United States and were resettled in Oklahoma