Amerind vs Amerindic

Amerind is a noun but Amerindic is not a noun.

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

As adjectives, Amerind and Amerindic are synonyms defined as:

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

Other synonyms of Amerind include Indian, Native American.

Amerind (noun)	Amerindic (noun)
any of the languages spoken by Amerindians

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