Indian millet vs silkgrass

Indian millet and silkgrass both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian millet	Yes	No	No	No
silkgrass	Yes	No	No	No

As nouns, Indian millet and silkgrass are synonyms defined as:

Indian millet and silkgrass: valuable forage grass of dry upland areas and plains of western North America to northern Mexico

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

Indian millet (noun)	silkgrass (noun)
sorghums of dry regions of Asia and North Africa	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