Rice grass and Silkgrass

Rice grass noun - Any grass of the genus Oryzopsis.

Silkgrass and rice grass are semantically related. In some cases you can replace term "Silkgrass" with "Rice grass", this terms are similar.

Silkgrass noun - Valuable forage grass of dry upland areas and plains of western North America to northern Mexico.

Rice grass and silkgrass are semantically related. You can use "Rice grass" instead a noun "Silkgrass".