kaffir corn vs sorghum

kaffir corn and sorghum both are nouns.

Word	Noun	Adjective	Verb	Adverb
kaffir corn	Yes	No	No	No
sorghum	Yes	No	No	No

As nouns, sorghum is a hypernym of kaffir corn; that is, sorghum is a word with a broader meaning than kaffir corn:

kaffir corn: important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves
sorghum: economically important Old World tropical cereal grass

kaffir corn (noun)	sorghum (noun)
important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves	made from juice of sweet sorghum
	economically important Old World tropical cereal grass