The head of a stream is typically referred to as the "source" or "headwaters." This is the point where the stream originates, which can be a spring, a melting glacier, or rainfall runoff. The source is crucial for the stream's flow and ecosystem, as it often feeds into larger bodies of water downstream.
Head is the source and mouth is where it ends.
A headwater is the place from which the water in the river or stream originates. It is also called the source of the river or stream
A stream or river called that flows into a larger stream or river is called a tributary.
A small stream is called a creek.
The side of a stream is usually called its bank.
It is occasionally called a sinking stream or a disappearing stream, but geographers and geologists normally call it a stream, just like another stream.
increases
Tributary is the answer you are looking for, I believe.
a waterway is a large stream
a tributary
a stream
The source of a stream is called a headwater or headstream. This is where the stream initially begins, often from a spring or melting snow.