Athapascan vs U.S.A.

Athapascan and U.S.A. both are nouns.

Word	Noun	Adjective	Verb	Adverb
Athapascan	Yes	No	No	No
U.S.A.	Yes	No	No	No

Athapascan (noun)	U.S.A. (noun)
a group of Amerindian languages (the name coined by an American anthropologist, Edward Sapir)	North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776
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