Below are possible answers for the crossword clue River mouth.
5 letter answer(s) to river mouth
DELTA
a low triangular area of alluvial deposits where a river divides before entering a larger body of water; "the Mississippi River delta"; "the Nile delta"
an object shaped like an equilateral triangle
the 4th letter of the Greek alphabet
7 letter answer(s) to river mouth
ESTUARY
the wide part of a river where it nears the sea; fresh and salt water mix
Other crossword clues with similar answers to 'River mouth'