River terminology?

Question

ok so theres a name for where the river starts and where the river ends and the mouth is one of them, which one is it and what is the other one?

Answer 1

The Source is where the river begins and the Mouth is where it empties.

Answer 2

Start - Source, Headwaters

Finish - Delta, Mouth, Estuary, Base Level, Confluence

Answer 3

Yeah... the source is where the river begins and the mouth is where it empties out into another body of water

Answer 4

The start is the Headwaters, and the end is the mouth.