Rapids
rapids
rapids
Water flowing over a cliff is called a waterfall.
wye
Water is called a stream when flowing in a definite direction.
A fast flowing stream is called a rapid. Rapids are where the water flows downhill very fast and over underwater obstacles.
A river must have enough width and a flowing water to be called a river no matter how long it is.
Amongst other things - a river
Volga
Amongst other things - a river
It's called "bank." As in river bank.
There are no natural flowing rivers in Libya. However, there is the Great Manmade River (GMR) that is actually a system of irrigation pipes that takes water to much of the desert areas in the country.