Indian millet vs Guinea corn

Indian millet and Guinea corn both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian millet	Yes	No	No	No
Guinea corn	Yes	No	No	No

As nouns, Indian millet and Guinea corn are synonyms defined as:

Indian millet and Guinea corn: sorghums of dry regions of Asia and North Africa

Other synonyms of Indian millet include doura, dourah, durra, Egyptian corn.

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