What are some grains used to make cereal that has 2 O's in the middle?

Some grains used to make cereal that have two O's in the middle include "sorghum" and "buckwheat." These grains are often incorporated into various cereal products for their nutritional benefits and unique flavors. Additionally, "oat" can also be considered, though it doesn't have two O's in the middle but is often associated with cereals.