The term 'Neighbor of Chad' refers to four countries that share a border with Chad: Nigeria (7 letters), Niger (5 letters), Libya (5 letters), and Sudan (5 letters). Nigeria is located in West Africa and is the most populous country in Africa. Niger is a landlocked country in West Africa, bordered by Algeria, Libya, Chad, Nigeria, Benin, Burkina Faso, and Mali. Libya is a North African country bordering the Mediterranean Sea, Egypt, Sudan, Chad, and Niger. Sudan is a country in Northeast Africa, bordered by Egypt, Eritrea, Ethiopia, South Sudan, Central African Republic, Chad, and Libya.