Source
Answer!-Usually the start of a river is called its source and the end of the river is called the mouth.
A stream or river called that flows into a larger stream or river is called a tributary.
The side of a stream is usually called its bank.
Well, the winds start from the west to start the current and then it will form the gulf stream
It is occasionally called a sinking stream or a disappearing stream, but geographers and geologists normally call it a stream, just like another stream.
Rivers normally start on higher ground, perhaps where there is ice melt. The drops gradually join together and become a small stream. The place where a river gets its start is called the source or headwaters.
Tributary is the answer you are looking for, I believe.
this is called a meandering stream.
a tributary
a waterway is a large stream
a stream
A stream of charged particles is called an electrical current.