Bateau.
a river a river
'A beautiful river' is "une belle rivière" in French.
The Thames river is called 'la Tamise' (fem.) in French.
The Mississippi river is called 'le fleuve Mississippi' in French. Fleuve (masc.) is the French name for a river that empties directly into a sea or ocean.
The Amazon river is called 'le fleuve amazone' in French. Fleuve (masc.) is the French name for a river that empties directly into a sea or ocean.
The Mississippi River and the St. Lawrence River
France is not situated on a river.
Ohio river
river
Ohio river
That would be the Oise River.