(adj.) full of action or movement
active
(n.) a very large rock
boulder
(n.) someone or something that makes something else happen
cause
(n.) the slow destruction of something by wind or water
erosion
(v.) to burst or break open violently
explode
(n.) things or people arranged in a straight line
row
(n.) a wall built to stop waves from eroding a shore
sea wall
(n.) the land along the edge of a body of water
shore
(n.) ground that slants up or down
slope
(v.) to hit very hard
smash
(adj.) firm or hard; not liquid or gas
solid
(adj.) having a sharp angle or slope
steep
