Madrid (the capital city of Spain); Madrid, Community of Madrid (an autonomous community of Spain); Madrid (a province of the Community of Madrid, Spain)
Madeira (an archipelago in the Atlantic Ocean and an autonomous region of Portugal); Madeira (the largest island in the Madeira Archipelago; in full, Madeira Island)
Maghreb (the predominantly Arabic-speaking geographic region comprising northwest Africa, particularly the region of Africa north of the Sahara and west of the Nile; the coastal plains of Morocco, Algeria, Tunisia, and western Libya)
Mahé (a small town in Mahé district in the union territory of Puducherry, India); Mahé (former French enclave comprising the town of Mahé and a few neigbouring towns, in the colonial part of French India)
Maine (a river in Maine-et-Loire department, Pays de la Loire, France, a tributary of the Loire, flowing 12 km through the city of Angers from the confluence of the Mayenne and Sarthe into the Loire)