| River dividing Asia and Europe | 30 |
| River deposits | 14 |
| River deposit | 13 |
| River delta, e.g. | 17 |
| River deliberately flooded in W.W. I | 36 |
| River dams | 10 |
| River dam | 9 |
| River curve | 11 |
| River crossing France's Nord department | 43 |
| River crossing | 14 |
| River crosser, perhaps | 22 |
| River crosser | 13 |
| River crossed in the Korean War | 31 |
| River crossed in Joshua | 23 |
| River crossed by the Ponte Vecchio | 34 |
| River crossed by the Pont d'Avignon | 39 |
| River crossed by the North Beacon Bridge | 40 |
| River crossed by the Longfellow Bridge | 38 |
| River crossed by Orpheus | 24 |
| River crossed by Charon | 23 |
| River crossed by Allied forces in February 1945 | 47 |
| River crossed by a ferry in a 1965 top 10 hit | 45 |
| River critters | 14 |
| River critter | 13 |
| River craft: Abbr. | 18 |
| River craft | 11 |
| River conveyance | 16 |
| River connected to a 165-mile long European canal | 49 |
| River connected by canal to the Volga | 37 |
| River connected by canal to the Tiber | 37 |
| River connected by canal to the Don | 35 |
| River City's state | 22 |
| River City's home | 21 |
| River City librarian | 20 |
| River circling the underworld | 29 |
| River channel | 13 |
| River celebrated by Wordsworth | 30 |
| River celebrated by Burns | 25 |
| River catch | 11 |
| River called Zhayyq in Kazakh | 29 |
| River called Ohre by Czechs | 27 |
| River called Liger by the ancients | 34 |
| River called Labe by Czechs | 27 |
| River called Hiddekil in the Bible | 34 |
| River called "Big Muddy" | 34 |
| River by Windsor Castle | 23 |
| River by the Royal Shakespeare Theatre | 38 |
| River by the Louvre | 19 |
| River by Ho Chi Minh City | 25 |
| River bus | 9 |
| River bridged by the Ponte Vecchio | 34 |
| River bottoms | 13 |
| River bottom substance | 22 |
| River bottom | 12 |
| River bordering Tokyo | 21 |
| River bordering the U. N. | 25 |
| River bordering the Olympic host cities Grenoble and Albertville | 64 |
| River bordering Manchuria | 25 |
| River bordering Lusatia | 23 |
| River bordering Germany | 23 |
| River boats or freight cars | 27 |
| River boats | 11 |
| River boat: Abbr. | 17 |
| River boat | 10 |
| River blockers | 14 |
| River blocker | 13 |
| River blockage | 14 |
| River block | 11 |
| River blade | 11 |
| River biter | 11 |
| River beyond the grave | 22 |
| River between two Midwestern states | 35 |
| River between two Great Lakes | 29 |
| River between Texas and Louisiana | 33 |
| River between Spain and Portugal | 32 |
| River between Poland and E. Germany | 35 |
| River between Ontario and Quebec | 32 |
| River between Manchuria and U.S.S.R. | 36 |
| River between Manchuria and the U.S.S.R. | 40 |
| River between Lake Erie and Lake Ontario | 40 |
| River between Great Lakes | 25 |
| River between Germany and Poland | 32 |
| River between Devon and Cornwall | 32 |
| River between China and Russia | 30 |
| River between China and North Korea | 35 |
| River between Argentina and Uruguay | 35 |
| River beside the Royal Shakespeare Theatre | 42 |
| River beneath the Brooklyn Bridge | 33 |
| River beneath the Brooklyn | 26 |
| River beneath the 6th October Bridge | 36 |
| River bends | 11 |
| River bend | 10 |
| River below the Boyoma Falls | 28 |
| River behind King's College | 31 |
| River bed, often dry | 20 |
| River bed, in Africa | 20 |
| River basin | 11 |
| River barriers | 14 |
| River barrier | 13 |
| River bank deposits | 19 |