Dravidian vs Kolam

Dravidian and Kolam both are nouns.

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

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

Dravidian: a member of one of the aboriginal inhabitants of India
Kolam: a member of a formerly tribal people now living in south central India

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

Dravidian (noun)	Kolam (noun)
a large family of languages spoken in south and central India and Sri Lanka, as well as overseas in Malaysia and Singapore	a member of a formerly tribal people now living in south central India
a member of one of the aboriginal inhabitants of India