According to Kagi Translate, a term for maize that's specific to Egypt is "الذرة الشامية" (al-dhura ash-shāmiyyah) which could be directly translated to "Levantine sorghum". Can anyone with actual knowledge of Egytian Arabic confirm?
Also I had the idea that "Maize" might have come from "Mısır", but etymonline claims it comes from the native (Arawakan) name for the plant: mahiz.