Answer:

plap

Answer	Crossword Clue
PLAP	Fall with a smack.
PLAP	Sound of an awkward dive.
PLAP	Sound of a flat dive.

PLAP	Flat sound.
PLAP	Strike with a dull sound.
PLAP	Fall with a dull sound.
PLAP	Fall with a flat sound.
PLAP	Flat, dull sound.
PLAP	Fall with a flat sound

Crossword

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