The River Nile has only four letters.
Unuk River
The river Main. May end in s
Bath.
aare
The Mississippi River was an important boundary in the Louisiana Purchase. The United States paid about $15 million for the Louisiana territory, which only worked out to about 4 cents per acre.
it is ORNE
Finn , Foyle or Erne
Pisa
Answer: EURO ( used in most of Europe).
urge
ural