Saudi Arabia
geographical name
Sau·di Arabia ˈsau̇-dē 
ˈsȯ-dē,
sä-ˈü-dē
country in southwestern Asia between the Red Sea and the Persian Gulf and occupying most of Arabia; capital Riyadh area 830,000 square miles (2,149,690 square kilometers), population 33,091,000
Note: Saudi Arabia is a kingdom comprising the former kingdoms of Nejd and Hejaz and the principality of Asir.
Saudi adjective or noun
Saudi Arabian adjective or noun