Austria-Hungary

geographical name

Aus·​tria-Hun·​ga·​ry ˈȯ-strē-ə-ˈhəŋ-gə-rē 

ˈä-

dual monarchy of central Europe 1867–1918 which included Bohemia, Moravia, Bukovina, Transylvania, Galicia, and what is now Austria, Hungary, Slovenia, Croatia, and northeastern Italy

Note: The assassination of Austrian Archduke Francis Ferdinand in Austria-Hungary on June 28, 1914 was the immediate cause of World War I.

Austro-Hungarian

ˈȯ-(ˌ)strō-ˌhəŋ-ˈger-ē-ən 

ˈä-

adjective or noun