| 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 |
| River originating in Cantabria | 30 |
| River originating in the Alps | 29 |
| River originating in the Savoy Alps | 35 |
| River originating near Winterberg | 33 |
| River Ouse city | 15 |
| River out of Pittsburgh | 23 |
| River outlet | 12 |
| River painted by Cézanne | 27 |
| River pair | 10 |
| River part | 10 |
| River parts | 11 |
| River past Amiens | 17 |
| River past Armentières | 25 |
| River past Bern | 15 |
| River past Berne | 16 |
| River past Buckingham | 21 |
| River past Caen | 15 |
| River past Ciudad BolÃvar | 28 |
| River past Dortmund | 19 |
| River past Dresden | 18 |
| River past Duisburg | 19 |
| River past Fontainebleau | 24 |
| River past Fremont, Nebraska | 28 |
| River past Geneva | 17 |
| River past Grenoble | 19 |
| River past Interlaken | 21 |
| River past Iola, Kansas | 23 |
| River past Liechtenstein | 24 |
| River past Logroño | 21 |
| River past Luxor | 16 |
| River past Memphis | 18 |
| River past Notre Dame | 21 |