| River of southern British Columbia | 34 |
| River of southern Germany | 25 |
| River of southern Kazakhstan | 28 |
| River of southern Manito-ba | 27 |
| River of Southwest | 18 |
| River of southwest England | 26 |
| River of Spain | 14 |
| River of Spain collector | 24 |
| River of Spain? | 15 |
| River of St. Petersburg | 23 |
| River of Strathclyde | 20 |
| River of Sumatra | 16 |
| River of SW England | 19 |
| River of Switzerland | 20 |
| River of Tasmania | 17 |
| River of Thailand | 17 |
| River of the Argonne | 20 |
| River of the Argonne Forest | 27 |
| River of the Bard | 17 |
| River of the Carolinas | 22 |
| River of the Congo | 18 |
| River of the Great Falls | 24 |
| River of the Korean War | 23 |
| River of the Left Bank | 22 |
| River of the Northwest | 22 |
| River of the Saskatchewan badlands | 34 |
| River of the South | 18 |
| River of the Southwest | 22 |
| River of the Ukraine | 20 |
| River of the underworld | 23 |
| River of the underworld, in myth | 32 |
| River of Thrace | 15 |
| River of Tours | 14 |
| River of Troyes | 15 |
| River of Turkey | 15 |
| River of Tuscany | 16 |
| River of two colors | 19 |
| River of Ukraine | 16 |
| River of Venezuela | 18 |
| River of Vietnam | 16 |
| River of W. W. I | 16 |
| River of W.W. I | 15 |
| River of W.W. I battle | 22 |
| River of W.W. I importance | 26 |
| River of W.W. I note | 20 |
| River of Wagner's "Ring" | 38 |
| River of Wales | 14 |
| River of west Africa | 20 |
| River of Western Europe | 23 |
| River of western Germany | 24 |
| River of Wien | 13 |
| River of Woe | 12 |
| River of woe, in Greek myth | 27 |
| River of Xanadu | 15 |
| River of Yakutsk | 16 |
| River of York | 13 |
| River of Yorkshire | 18 |
| River of Yugoslavia | 19 |
| River of Yuma and Phoenix | 25 |
| River of Zaire | 14 |
| River on French-Belgian boundary | 32 |
| River on North Korea's border | 33 |
| River on Paraguay's border | 30 |
| River on Switzerland's border | 33 |
| River on the Benin border | 25 |
| River on the Brandenburg border | 31 |
| River on The Broads | 19 |
| River on the Canadian border | 28 |
| River on the China/North Korea border | 37 |
| River on the Korean border | 26 |
| River on the North Korea/China border | 37 |
| River on the Texas/Louisiana border | 35 |
| River on Zaire's boundary | 29 |
| River once called Obringa | 25 |
| River or canal | 14 |
| River or cartoonist | 19 |
| River or city | 13 |
| River or city in S.D. | 21 |
| River or city of Maine | 22 |
| River or dam in Germany | 23 |
| River or dynasty | 16 |
| River or earldom | 16 |
| River or former English county | 30 |
| River or Gershwin's first big hit | 37 |
| River or goose | 14 |
| River or Indian | 15 |
| River or lake in Tex. and La. | 29 |
| River or monster | 16 |
| River or mountains | 18 |
| River or province in Chile | 26 |
| River or province of Luzon | 26 |
| River or range | 14 |
| River or region in Europe | 25 |
| River or reservoir in Hesse | 27 |
| River or sea | 12 |
| River or South | 14 |
| River or state | 14 |
| River or town in Ecuador | 24 |
| River or town in Wash. | 22 |
| River or wine | 13 |