Cereal grass and Wheat

Cereal grass noun - Grass whose starchy grains are used as food: wheat; rice; rye; oats; maize; buckwheat; millet.

Wheat and cereal grass are semantically related. In some cases you can replace term "Wheat" with "Cereal grass", this terms are similar.

Wheat noun - Annual or biennial grass having erect flower spikes and light brown grains.

Cereal grass and wheat are semantically related. Sometimes you can use "Cereal grass" instead a noun "Wheat".