| 100% | MOUTH | 5 | River part |
| 100% | DELTA | 5 | River part |
| 91% | BANKS | 5 | River parts |
| 91% | MOUTHS | 6 | River parts |
| 75% | FORK | 4 | Part of a river |
| 72% | EMS | 3 | River forming part of the Germany-Netherlands boundary |
| 70% | DEE | 3 | River that forms part of the England/Wales boundary |
| 70% | GUADIANA | 8 | River that forms part of the Spain-Portugal border |
| 70% | OHIO | 4 | River forming the borders of parts of five states |
| 69% | MOUTH | 5 | Part of a face or a river |
| 69% | ALABAMABORDER | 13 | The Chattahoochee River forms part of it |
| 69% | RAPTURE | 7 | Delight plays part by river |
| 69% | FACTION | 7 | Group gets part without river |
| 68% | ARAS | 4 | River forming part of the border between Azerbaijan and Iran |
| 68% | URAL | 4 | River forming part of the boundary between Europe and Asia |
| 68% | MOSELLE | 7 | River forming part of the border between Germany and Luxembourg |
| 67% | DELTA | 5 | Note tale about part of river |
| 67% | RAPIDS | 6 | Fast flowing part of a river |
| 66% | SHALLOWS | 8 | Not-very-deep parts of rivers |
| 66% | ODER | 4 | River that forms part of the border between Germany and Poland |
| 66% | BERMEJO | 7 | River of N Argentina forming part of the border with Bolivia |
| 66% | ORINOCO | 7 | River that forms part of the border between Colombia and Venezuela |
| 66% | MOSELLE | 7 | River that forms part of the border between Germany and Luxembourg |
| 66% | PERU | 4 | The Putumayo River forms part of its northern border |
| 66% | IOWA | 4 | The Big Sioux River forms part of its border |
| 64% | ELBE | 4 | River that formed part of the border between East and West Germany |
| 62% | SNAKE | 5 | — River, US watercourse forming part of the border between Idaho and Oregon |
| 61% | ESTUARIES | 9 | Wide parts of rivers where they reach the sea |
| 60% | YALU | 4 | River that forms a large part of the border between North Korea and China |
| 60% | ESTUARY | 7 | Wide part of a river where it meets the sea |