Synonyms for Kaffir (same or very similar meaning)
WordNet sense 1 (important for human and animal food; growth habit and stem form similar to Indian corn but having sawtooth-edged leaves):
great millet, kaffir corn, kafir corn, Sorghum bicolorWordNet sense 2 (an offensive term for any Black African):
caffer, caffre, KafirFrom the ODE community, based on WordNetadd/edit