| PEK | River in eastern Serbia that is a 129 km long right tributary of the Danube |
| ERNE | 129 km river in the NW of the isle of Ireland |
| MARNE | French river that is a right tributary of the Seine in the area east and southeast of Paris |
| KOSOVO | Former province of Serbia that declared independence in 2008, capital Pristina (6) |
| RUHR | Right tributary of the Rhine |
| LAHN | Right tributary of the Rhine |
| ROT | Southern tributary of the Danube in the region of Upper Swabia in Baden-Wurttemberg, Germany |
| TISZA | Longest tributary of the Danube River, formed by two headstreams (Black and White) in the Carpathian Mountains of western Ukraine (5) |
| RISS | Named after a tributary of the Danube, the third stage of Alpine glaciation (4) |
| ELBURZ | Major mountain range in northern Iran that is 560 miles (900 km) long. This range, most broadly defined, extends in an arc eastward from the frontier with Azerbaijan southwest of the Caspian Sea to th |
| SUBGLACIAL | More than 150 miles (about 240 km) long with a maximum width of about 31 miles (50 km), Lake Vostok is the largest lake in Antarctica, and the largest __________ lake known (10) |
| RUSE | Largest river port of Bulgaria, on the right bank of the Danube opposite the Romanian city of Giurgiu (4) |
| POST | One of 129 in a classic thread of bodybuilders arguing about the number of days in a week |
| HINDUKUSH | A major mountain system of Central Asia, primarily in Afghanistan and Pakistan. Broadly defined, it is some 500 miles (800 km) long and up to 150 miles (240 km) wide. Its highest point is Tirich Mir. |
| OKINAWA | The largest island in the Ryukyu Island chain, being about 70 miles (112 km) long and 7 miles (11 km) wide and having an area of 463 square miles (1,199 square km). (7) |
| ENNS | Austrian river, a tributary of the Danube (4) |
| UBANGI | Mighty 2,250 km long river that passes through Bangui to join the Congo River (6) |
| ISAR | Tributary of the Danube that runs through Bavaria (4) |
| NERA | Tributary of the Danube |
| SAVA | Tributary of the Danube |
