| 100% | IOWA | 4 | Its east and west borders are formed entirely by rivers |
| 76% | IOWA | 4 | Its eastern and western borders are formed entirely by rivers |
| 72% | IOWA | 4 | Only state whose west and east borders are formed entirely by rivers |
| 56% | IOWA | 4 | Only state whose entire east and west borders are rivers |
| 42% | IOWA | 4 | State whose eastern border is formed by the Mississippi River |
| 41% | ELBE | 4 | River that formed part of the border between East and West Germany |
| 40% | ZAMBEZI | 7 | River that is bordered by Zambia and Zimbabwe |
| 40% | SEA | 3 | It may be bordered by beaches and cliffs |
| 39% | SHOULDER | 8 | It is formed by bones such as clavicle and scapula |
| 38% | IOWA | 4 | The Mississippi and Missouri rivers form parts of its border |
| 37% | RAVINE | 6 | Deep and narrow, it's formed by a stream or river |
| 36% | DOURO | 5 | River that forms part of the border between Spain and Portugal before flowing west to the Atlantic |
| 35% | MAHJONGG | 8 | Its positions are labeled North, South, East and West |
| 35% | INDIAN | 6 | & 4D Large body of water bordered by Africa in the west and Australia in the east |
| 35% | LAOS | 4 | Asian country bordered on the east and west by Vietnam and Thailand |
| 33% | YSER | 4 | WWI battle named after the river where the German Army was obstructed by opening sluices and flooding land to the west |
| 33% | LAKEGENEVA | 10 | Its borders are French and Swiss |
| 32% | SANTEE | 6 | River formed by the Congaree and Wateree |
| 32% | URUGUAY | 7 | __ is bordered by Brazil and Argentina |
| 32% | POWERPC | 7 | It was developed by Apple, IBM and Motorola |
| 32% | HENRI | 5 | It was shared by Matisse and Toulouse-Lautrec |
| 31% | IOWA | 4 | It borders both the Missouri and the Mississippi rivers |
| 31% | PANAM | 5 | Its first flights were between Key West and Havana |
| 31% | WAVENEY | 7 | River forming the eastern border between Norfolk and Suffolk |
| 31% | LIMPOPO | 7 | River forming the border between Zimbabwe and South Africa |
| 31% | MORAVA | 6 | River that forms the border between Slovakia and Austria |
| 31% | MEKONG | 6 | River that forms the border between Laos and Myanmar |
| 31% | IOWA | 4 | The Mississippi River forms its eastern border |
| 31% | ORION | 5 | Constellation whose belt is formed by the stars Alnitak, Alnilam, and Mintaka |
| 31% | WESER | 5 | River formed by the junction of the Fulda and Werra |