Amerind vs Native American

Amerind and Native American both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amerind	Yes	Yes	No	No
Native American	Yes	Yes	No	No

As adjectives, Amerind and Native American are synonyms defined as:

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

Other synonyms of Amerind include Amerindic, Indian.

Amerind (noun)	Native American (noun)
any of the languages spoken by Amerindians	any member of the peoples living in North or South America before the Europeans arrived

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