Answer:

runnel

Answer	Crossword Clue
RUNNEL	Rivulet
RUNNEL	Small stream
RUNNEL	Streamlet

RUNNEL	Streamlet.
RUNNEL	Rivulet.
RUNNEL	Brook.
RUNNEL	Brooklet.
RUNNEL	Brook

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.