Oryzopsis hymenoides vs mountain rice

Oryzopsis hymenoides and mountain rice both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oryzopsis hymenoides	Yes	No	No	No
mountain rice	Yes	No	No	No

As nouns, Oryzopsis hymenoides and mountain rice are synonyms defined as:

Oryzopsis hymenoides and mountain rice: valuable forage grass of dry upland areas and plains of western North America to northern Mexico

Other synonyms of Oryzopsis hymenoides include Indian millet, silk grass, silkgrass.

Oryzopsis hymenoides (noun)	mountain rice (noun)
valuable forage grass of dry upland areas and plains of western North America to northern Mexico	valuable forage grass of dry upland areas and plains of western North America to northern Mexico