A trickle, brook
The Choctaw word for small stream is "bayuk." The word "bayou" is derived from this Choctaw term.
brook
brook, creek, rivulet, run, stream,
The small aircraft was really jolted when it entered the jet stream.
A small brook or stream in a formal context is often referred to as a rivulet.
Yes the word stream is a noun. It is a common noun.
Rill
No, it is not. The word creek is a noun (small river or stream).
A stream, a small body of flowing water.
runnel
tributary
It is a Rill.