Indian vs Dravidian

Indian and Dravidian both are nouns.

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

As nouns, Dravidian is a hyponym of Indian; that is, Dravidian is a word with a more specific, narrower meaning than Indian:

Indian (noun)	Dravidian (noun)
any of the languages spoken by Amerindians	a large family of languages spoken in south and central India and Sri Lanka, as well as overseas in Malaysia and Singapore
a native or inhabitant of India	a member of one of the aboriginal inhabitants of India

Indian (adjective)	Dravidian (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