| River known in ancient times as Obringa | 39 |
| River known for water gap | 25 |
| River known for the goldfields in its basin | 43 |
| River known for its valley | 26 |
| River known for disastrous floods | 33 |
| River known anciently as Obringa | 32 |
| River just south of the Central African Republic | 48 |
| River Jordan's destination | 30 |
| River Jolson loved | 18 |
| River joining the Missouri near Jefferson City | 46 |
| River joining the Fulda | 23 |
| River islets | 12 |
| River islet | 11 |
| River isles | 11 |
| River isle | 10 |
| River islands, to Brits | 23 |
| River islands | 13 |
| River island: Var. | 18 |
| River island, to Brits | 22 |
| River island | 12 |
| River into which the Vltava flows | 33 |
| River into which the Kentucky flows | 35 |
| River into which the Great Miami flows | 38 |
| River into which the Fulda flows | 32 |
| River into which the Big Sandy flows | 36 |
| River into which Rasputin was thrown | 36 |
| River into Utah Lake | 20 |
| River into the Yellow Sea | 25 |
| River into the Weser | 20 |
| River into the Tiber | 20 |
| River into the Tatar Strait | 27 |
| River into the Skagerrak | 24 |
| River into the Severn | 21 |
| River into the Seine | 20 |
| River into the Rhone | 20 |
| River into the Ouse | 19 |
| River into the Ohio: abbr. | 26 |
| River into the Ohio | 19 |
| River into the North Sea | 24 |
| River into the Mosel | 20 |
| River into the Mediterranean | 28 |
| River into the Irish Sea | 24 |
| River into the Gulf of Venice | 29 |
| River into the Gulf of Tonkin | 29 |
| River into the Fulda | 20 |
| River into the English Channel | 30 |
| River into the Elbe | 19 |
| River into the Dordogne | 23 |
| River into the Danube | 21 |
| River into the Caspian | 22 |
| River into the Bay of the Seine | 31 |
| River into the Bay of Biscay | 28 |
| River into the Baltic | 21 |
| River into the Arkansas | 23 |
| River into Solway Firth | 23 |
| River into Ostia | 16 |
| River into Monterey Bay | 23 |
| River into Lyon | 15 |
| River into Lake Ontario | 23 |
| River into Lake Ilmen | 21 |
| River into Lake Geneva | 22 |
| River into Lake Chad | 20 |
| River into Korea Bay | 20 |
| River into Issyk-Kul | 20 |
| River into Donegal Bay | 22 |
| River into Chesapeake Bay | 25 |
| River into Bristol Channel | 26 |
| River into Bay of the Seine | 27 |
| River into Bay of Biscay | 24 |
| River intentionally flooded in W.W. I | 37 |
| River inlets | 12 |
| River inlet | 11 |
| River including Livingstone Falls | 33 |
| River in Zaire | 14 |
| River in Yugoslavia | 19 |
| River in Yorkshire | 18 |
| River in Xanadu | 15 |
| River in WWI battle history | 27 |
| River in which Rasputin was thrown | 34 |
| River in which Achilles was dipped | 34 |
| River in western Europe | 23 |
| River in western China | 22 |
| River in western Belgium | 24 |
| River in western Africa | 23 |
| River in West Germany | 21 |
| River in Warwickshire | 21 |
| River in Wales and England | 26 |
| River in Wales | 14 |
| River in W.W. I fighting | 24 |
| River in W. Germany | 19 |
| River in W Turkey | 17 |
| River in W Europe | 17 |
| River in W Canada | 17 |
| River in W Africa | 17 |
| River in view in "Room With a View" | 45 |
| River in Venezuela | 18 |
| River in Va. | 12 |
| River in Umbria | 15 |
| River in Ulster | 15 |
| River in U.S.S.R. | 17 |