beach

breaker

bubble

bubbles

capsize

cavern

cavernous

cavity

choppy

coast

crash

crush

dark

deep

drip

dripping

drop

foam

ghostly

hit

hollow

hull

impact

lap

lapping

mysterious

ocean

roar

rock

seashore

seawash

shipwreck

shore

shoreline

splash

splatter

splish

splosh

spooky

sunk

surf

thud

thunderous

tide

wade

wash

waterfront

wave

waves

well

sink