| 100% | LETHE | 5 | River that the dead drank from, in myth |
| 52% | STYX | 4 | River that separates Earth and the Underworld, in Greek myth |
| 50% | PEPSI | 5 | Drink that removed the "-Cola" from its name in 1961 |
| 48% | ARA | 3 | Irish river that many stray golf balls from the Tipperary Golf Club might end up in |
| 46% | OCEANOS | 7 | In Greek myth, the river that surrounds the Earth |
| 44% | TIBER | 5 | River that rises in the Apennines |
| 44% | SARANAC | 7 | River that begins in the Adirondacks |
| 44% | HEL | 3 | Abode of the dead, in Norse myth |
| 44% | ISIS | 4 | Protector of the dead, in Egyptian myth |
| 44% | AARE | 4 | River that flows from the Bernese Alps |
| 44% | EBRO | 4 | River that rises in the Cantabrian Mountains |
| 44% | AAR | 3 | River that rises in the Bernese Alps |
| 43% | ISIS | 4 | Protector of the dead, in myth |
| 43% | THAMES | 6 | River that flows under the Tower Bridge in London |
| 43% | STYX | 4 | River of the underworld, in Greek myth |
| 43% | ACHERON | 7 | River to the underworld, in Greek myth |
| 43% | RHONE | 5 | French river that rises in the Alps |
| 42% | TAW | 3 | River that flows from Dartmoor to Barnstaple Bay in Devon |
| 42% | ERIE | 4 | Great Lake that the Niagara River flows from |
| 42% | RHINE | 5 | German river that starts in the Swiss Alps |
| 42% | STYX | 4 | River of the underworld, in myth |
| 42% | ILLER | 5 | River that flows into the Danube in the center of Ulm |
| 42% | MARNE | 5 | River that was the site of battles in both world wars |
| 41% | NILE | 4 | Egyptian river that's the longest in the world |
| 41% | VOLGA | 5 | Long Russian river that starts in the Moscow hills |
| 41% | RHONE | 5 | River flowing from the Alps in Switzerland |
| 41% | LIMPOPO | 7 | River that rises in South Africa whose name is derived from Rivombo |
| 41% | PECOS | 5 | River that flows from New Mexico through Texas to the Rio Grande |
| 41% | RIOGRANDE | 9 | River that flows from Colorado to the Gulf of Mexico: 2 wds. |
| 41% | SEIN | 4 | River that's the site of Javert's demise in "Les Misérables" |