Indian vs Amerind

Indian and Amerind both are nouns.

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

As adjectives, Indian and Amerind are synonyms defined as:

Indian and Amerind: of or pertaining to Native Americans or their culture or languages

Other synonyms of Indian include Amerindic, Native American.

As nouns, Indian and Amerind are synonyms defined as:

Indian (noun)	Amerind (noun)
any of the languages spoken by Amerindians	any of the languages spoken by Amerindians
a native or inhabitant of India

Indian (adjective)	Amerind (adjective)
of or relating to or characteristic of India or the East Indies or their peoples or languages or cultures	of or pertaining to Native Americans or their culture or languages
of or pertaining to Native Americans or their culture or languages