Indian language vs Amerind

Indian language and Amerind both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian language	Yes	No	No	No
Amerind	Yes	Yes	No	No

As nouns, Indian language and Amerind are synonyms defined as:

Indian language (noun)	Amerind (noun)
any of the languages spoken by Amerindians	any of the languages spoken by Amerindians

Indian language (adjective)	Amerind (adjective)
	of or pertaining to Native Americans or their culture or languages