Eskimo-Aleut vs Aleut

Eskimo-Aleut and Aleut both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eskimo-Aleut	Yes	No	No	No
Aleut	Yes	No	No	No

As nouns, Aleut is a hyponym of Eskimo-Aleut; that is, Aleut is a word with a more specific, narrower meaning than Eskimo-Aleut:

Other hyponyms of Eskimo-Aleut include Eskimo, Eskimo language, Esquimau, Esquimau language, Aleut language.

Eskimo-Aleut (noun)	Aleut (noun)
the family of languages that includes Eskimo and Aleut	the language spoken by the Aleut
	a community of Native Americans who speak an Eskimo-Aleut language and inhabit the Aleutian Islands and southwestern Alaska
	a member of the people inhabiting the Aleutian Islands and southwestern Alaska