kaffir corn vs great millet

kaffir corn and great millet both are nouns.

Word	Noun	Adjective	Verb	Adverb
kaffir corn	Yes	No	No	No
great millet	Yes	No	No	No

As nouns, kaffir corn and great millet are synonyms defined as:

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

Other synonyms of kaffir corn include kaffir, kafir corn, Sorghum bicolor.

kaffir corn (noun)	great millet (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