great millet vs Sorghum bicolor

great millet and Sorghum bicolor both are nouns.

Word	Noun	Adjective	Verb	Adverb
great millet	Yes	No	No	No
Sorghum bicolor	Yes	No	No	No

As nouns, great millet and Sorghum bicolor are synonyms defined as:

great millet and Sorghum bicolor: important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves

Other synonyms of great millet include kaffir, kaffir corn, kafir corn.

great millet (noun)	Sorghum bicolor (noun)
important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves	important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves