Brown rice and Wild rice

Brown rice noun - Unpolished rice retaining the yellowish-brown outer layer.

Wild rice and brown rice are semantically related In some cases you can replace phrase "Wild rice" with "Brown rice", this phrases are similar.

Wild rice noun - Perennial aquatic grass of North America bearing grain used for food.

Brown rice and wild rice are semantically related in perennial aquatic grass topic. You can use "Brown rice" instead a noun phrase "Wild rice".