Oise and Orne are two possibilities.
Ob is a river in Russia. It begins with the letter O.
The Orinoco River.
The Ob River in Russia is one of the longest rivers in Asia. It begins with the letter O.
The Ohio River is in the United States. The Oder River is in Czech Republic, Poland and Germany.
ooze
The Osage River is in Missouri. Its length is 444 kilometers. It is located in Vernon County, Missouri.
No, there is not a continent that begins with the letter O.
Oman is the only country that begins with the letter O.
Oxygen is a gas that begins with the letter O.
Oxygen is a gas that begins with the letter O.
How about this one: http://en.wikipedia.org/wiki/Oder_River
No college in Maine begins with the letter O.