Caddoan is an adjective used to describe the indigenous people and their languages in the Southern Great Plains region of the United States. Some synonyms for Caddoan are Plains Indians and Southern Plains Indigenous People. The Caddoan peoples were known for their agricultural practices and complex societies, and their languages are still spoken today by some members of Caddo Nation. Other synonyms for Caddoan could include Wichita, Pawnee, and Arikara, as these are all tribes that were part of the Caddoan language family. Studying the Caddoan peoples and their languages is an important way to learn about the indigenous history and culture of the Southern Great Plains region.