| 100% | ITASCA | 6 | Minnesota lake that's the source of the Mississippi River |
| 88% | ITASCA | 6 | Minnesota lake that's the headwater of the Mississippi River |
| 77% | ITASCA | 6 | Lake that's the source of the Mississippi |
| 76% | ERIE | 4 | Lake that's the source of the Niagara River |
| 76% | XXXX | 4 | Lake that's the source of the Niagara River |
| 74% | ITASCA | 6 | Lake that's a source of the Mississippi |
| 74% | OTSEGO | 6 | New York lake that's the source of the Susquehanna River |
| 73% | ITASCA | 6 | Lake —, source in Minnesota, US, of the Mississippi River |
| 68% | ITASCA | 6 | Lake that is a source of the Mississippi |
| 68% | ITASCA | 6 | Minnesota lake at the source of the Mississippi River |
| 63% | PERU | 4 | Country that's the source of the Amazon River |
| 59% | SINGSING | 8 | *Prison on the Hudson that's the source of "up the river" |
| 58% | ITASCA | 6 | Lake that's the Mississippi's source |
| 56% | ITASCA | 6 | Lake ___, source of the Mississippi |
| 56% | ITASCA | 6 | Lake source of the Mississippi |
| 55% | ITASCA | 6 | Minnesota lake that feeds the Mississippi |
| 55% | ERIE | 4 | Lake source of the Niagara River |
| 55% | ERIE | 4 | Lake ___, source of the Niagara River |
| 54% | ERIE | 4 | Lake that's one of the sources of Niagara Falls |
| 52% | OSAGE | 5 | 276-mile-long Missouri river that the Harry S. Truman Reservoir and the Lake of the Ozarks sits on |
| 51% | IOTA | 4 | Greek letter that's the source of the word "jot" |
| 50% | LUKE | 4 | Book that's the source of the phrase "Physician, heal thyself" |
| 50% | ERIE | 4 | Lake that's largely fed by the Detroit River |
| 50% | CACAO | 5 | Tree that's the source of chocolate |
| 50% | NUTMEG | 6 | Tree that's the source of mace |
| 50% | POPPY | 5 | Flower that's the source of opium |
| 50% | CACAO | 5 | Bean that's the source of chocolate |
| 50% | JOURNEYMAN | 10 | Language that's the source of "gesundheit" |
| 50% | AGAVE | 5 | Plant that's the source of mescal |