Dravidian vs Kotar

Dravidian and Kotar both are nouns.

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

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

Dravidian: a member of one of the aboriginal inhabitants of India
Kotar: a member of the Dravidian people living in the Nilgiri Hills in southern India

Other hyponyms of Dravidian include Badaga, Gadaba, Gond, Canarese, Kanarese, Kolam, Kota, Kui, Malto, Savara, Tamil, Telugu, Toda, Tulu.

Dravidian (noun)	Kotar (noun)
a large family of languages spoken in south and central India and Sri Lanka, as well as overseas in Malaysia and Singapore	a Dravidian language spoken by the Kota
a member of one of the aboriginal inhabitants of India	a member of the Dravidian people living in the Nilgiri Hills in southern India