WordNet sense 1 (abounding in small stones):

pebbly, shingly

WordNet sense 2 ((of a shore or shoreline) having an extensive gently sloping area covered with sand or gravel or shingle down to the water line):

beachlike, beachy

WordNet sense 3 (unpleasantly harsh or grating in sound):

grating, gravel, raspy, rough, scratchy, rasping

WordNet sense 4 (having an unpleasant sound):

cacophonous, cacophonic