Aleutian vs Amerindian

Aleutian and Amerindian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aleutian	Yes	Yes	No	No
Amerindian	Yes	No	No	No

As nouns, Amerindian is a hypernym of Aleutian; that is, Amerindian is a word with a broader meaning than Aleutian:

Aleutian: a member of the people inhabiting the Aleutian Islands and southwestern Alaska
Amerindian: any member of the peoples living in North or South America before the Europeans arrived

Other hypernyms of Aleutian include Native American.

Aleutian (noun)	Amerindian (noun)
a member of the people inhabiting the Aleutian Islands and southwestern Alaska	any member of the peoples living in North or South America before the Europeans arrived

Aleutian (adjective)	Amerindian (adjective)
of or relating to the Aleut or their language or culture