| River across the French/German border | 37 |
| River across the Lake of Brienz | 31 |
| River activity | 14 |
| River Afton's scenery | 25 |
| River Aire city | 15 |
| River along the China/Korea border | 34 |
| River along the Oregon Trail | 28 |
| River along the Quai d'Orsay | 32 |
| River along the Zambia-Zimbabwe border | 38 |
| River alongside King's College | 34 |
| River alongside the Royal Shakespeare Theatre | 45 |
| River among monsters? | 21 |
| River and city in Maine | 23 |
| River and lake in Scotland | 26 |
| River and lake of Alberta | 25 |
| River and lake-system in N.Y. | 29 |
| River and park of West | 22 |
| River and state | 15 |
| River and town near Chicago | 27 |
| River area | 10 |
| River area, in France | 21 |
| River areas | 11 |
| River areas in France | 21 |
| River areas named for their shape | 33 |
| River arm: Abbr. | 16 |
| River around the Île de la Cité | 37 |
| River at Amiens | 15 |
| River at Arles | 14 |
| River at Avignon | 16 |
| River at Bern | 13 |
| River at Berne | 14 |
| River at Bristol | 16 |
| River at Caen | 13 |
| River at Chartres | 17 |
| River at Frankfurt | 18 |
| River at Ghent | 14 |
| River at Leeds | 14 |
| River at Liège | 17 |
| River at Lyon | 13 |
| River at Memphis | 16 |
| River at Nantes | 15 |
| River at Orléans | 19 |
| River at Orsk | 13 |
| River at Pisa | 13 |
| River at Plymouth Sound | 23 |
| River at Rennes | 15 |
| River at Rome | 13 |
| River at Stratford, Conn. | 25 |
| River at Tours | 14 |
| River at Vicksburg | 18 |
| River at Yuma | 13 |
| River at Zaragoza | 17 |
| River bank | 10 |
| River bank deposits | 19 |
| River barrier | 13 |
| River barriers | 14 |
| River basin | 11 |
| River bed, in Africa | 20 |
| River bed, often dry | 20 |
| River behind King's College | 31 |
| River below the Boyoma Falls | 28 |
| River bend | 10 |
| River bends | 11 |
| River beneath the 6th October Bridge | 36 |
| River beneath the Brooklyn | 26 |
| River beneath the Brooklyn Bridge | 33 |
| River beside the Royal Shakespeare Theatre | 42 |
| River between Argentina and Uruguay | 35 |
| River between China and North Korea | 35 |
| River between China and Russia | 30 |
| River between Devon and Cornwall | 32 |
| River between Germany and Poland | 32 |
| River between Great Lakes | 25 |
| River between Lake Erie and Lake Ontario | 40 |
| River between Manchuria and the U.S.S.R. | 40 |
| River between Manchuria and U.S.S.R. | 36 |
| River between Ontario and Quebec | 32 |
| River between Poland and E. Germany | 35 |
| River between Spain and Portugal | 32 |
| River between Texas and Louisiana | 33 |
| River between two Great Lakes | 29 |
| River between two Midwestern states | 35 |
| River beyond the grave | 22 |
| River biter | 11 |
| River blade | 11 |
| River block | 11 |
| River blockage | 14 |
| River blocker | 13 |
| River blockers | 14 |
| River boat | 10 |
| River boat: Abbr. | 17 |
| River boats | 11 |
| River boats or freight cars | 27 |
| River bordering Germany | 23 |
| River bordering Lusatia | 23 |
| River bordering Manchuria | 25 |
| River bordering the Olympic host cities Grenoble and Albertville | 64 |
| River bordering the U. N. | 25 |
| River bordering Tokyo | 21 |
| River bottom | 12 |