Plains Indian and Red Indian

Plains Indian noun - A member of one of the tribes of American Indians who lived a nomadic life following the buffalo in the Great Plains of North America.

Red Indian and Plains Indian are semantically related. In some cases you can use "Red Indian" instead a noun phrase "Plains Indian".

Red Indian noun - A member of the race of people living in America when Europeans arrived.

Plains Indian and Red Indian are semantically related. Sometimes you can replace phrase "Plains Indian" with "Red Indian", this phrases are similar.