| 100% | RIO | 3 | ___ Grande (river that flows to the Gulf of Mexico) |
| 79% | RIOGRANDE | 9 | River that flows from Colorado to the Gulf of Mexico: 2 wds. |
| 72% | PECOS | 5 | River that flows from New Mexico through Texas to the Rio Grande |
| 69% | SUWANNEE | 8 | US river rising in the Okefenokee Swamp on the Georgia-Florida border that flows to the Gulf of Mexico |
| 68% | RIO | 3 | ___ Grande (river to the Gulf of Mexico) |
| 68% | BRAZOS | 6 | River to the Gulf of Mexico |
| 60% | EBRO | 4 | River in Spain that flows to the Mediterranean southwest of Tarragona |
| 60% | VISTULA | 7 | River of Poland that flows to the Baltic Sea near Gdansk |
| 60% | SNAPPER | 7 | Ocean seafood fish native to the Gulf of Mexico |
| 60% | URAL | 4 | River that flows to the Caspian Sea |
| 58% | TAFF | 4 | River that flows to the Bristol Channel at Cardiff |
| 58% | TAGUS | 5 | River that flows to the Atlantic at Lisbon, Portugal |
| 58% | WEAR | 4 | River that flows to the North Sea at Sunderland |
| 58% | TEES | 4 | River that flows to the North Sea at Middlesbrough |
| 58% | RIBBLE | 6 | River that flows to the Irish Sea near Preston |
| 58% | AVON | 4 | River of central England that flows to the River Severn at Tewkesbury |
| 58% | URE | 3 | River of North Yorkshire that flows to the Swale to form the Ouse |
| 57% | YANGTZE | 7 | River that flows to the East China Sea near Shanghai, China |
| 57% | BAY | 3 | Tampa ___ (large natural harbor connected to the Gulf of Mexico) |
| 57% | URAL | 4 | Russian river that flows to the Caspian Sea at Guryev |
| 56% | DOURO | 5 | River that forms part of the border between Spain and Portugal before flowing west to the Atlantic |
| 56% | TYNE | 4 | English river that flows to the North Sea at South Shields |
| 56% | ELBE | 4 | 380 mile central European river that flows to the North Sea |
| 56% | PECOS | 5 | River from New Mexico that flows into the Rio Grande |
| 56% | SUWANNEE | 8 | US river rising in the Okefenokee Swamp on the Georgia-Florida border which flows to the Gulf of Mexico |
| 55% | VLTAVA | 6 | River that flows through the heart of Prague |
| 55% | UBANGI | 6 | River that flows through the city of Bangui |
| 55% | NIGER | 5 | River to the Gulf of Guinea |
| 55% | NEVA | 4 | River to the Gulf of Finland |
| 55% | OSAGE | 5 | River that flows into the Lake of the Ozarks |