| TISZA | Longest tributary of the Danube River, formed by two headstreams (Black and White) in the Carpathian Mountains of western Ukraine (5) |
| VISTULA | Polish river rising in the Carpathian Mountains and flowing past Warsaw and Torun to the Baltic |
| ARCTICFOX | The creature Alopex lagopus, whose fur is dark grey in the summer and white in the winter |
| FORTH | River formed by two streams coming together near Aberfoyle (5) |
| RHAETIA | Ancient Roman Alpine province south of the Danube river (7) |
| BUDAPEST | Hungarian capital spanning both sides of the Danube River |
| MONGOL | Empire founded by Genghis Khan in 1206 in the Steppe of central Asia. By the late 13th century it reached from the Pacific Ocean in the east to the Danube River and the shores of the Persian Gulf in t |
| MOSELLE | Longest tributary of the Rhine River and the name of a popular white wine |
| TENNESSEE | River of the south-eastern US, the longest tributary of the Ohio (9) |
| MAIN | Longest tributary of the Rhine. and the longest river flowing entirely within Germany (4) |
| SAVANNAH | US river formed by the confluence of the Seneca and Tugaloo Rivers in South Carolina (8) |
| YAMUNA | Longest tributary of the Ganges, site of the Taj Mahal on its west bank (6) |
| OHIO | River formed by the joining of the Allegheny and the Monongahela |
| CLYDE | Major Scottish river, formed by the confluence of the Daer Water and Potrail Water (5) |
| RUTHENIA | Historic region south of the Carpathian mountains in modern-day Ukraine; source of the name of chemical element 44 (8) |
| ULM | In which city on the Danube River is the largest Gothic church in Germany, after the Cologne Cathedr |
| NOVISAD | One of the three European Capitals of Culture for 2021, in NE Serbia on the Danube river (4,3) |
| LUALABA | River of the Democratic Republic of the Congo; a headstream of the Congo River (7) |
| ROT | Southern tributary of the Danube in the region of Upper Swabia in Baden-Wurttemberg, Germany |
| WESER | River formed by the junction of the Fulda and Werra |
