slide
mass movement of rock, soil, mud, or snow under the force of gravity
landslide
type of natural disasters involving ground movements, often caused by slope instability triggered by specific event
debris flow
geological phenomena in which water-laden masses of soil and fragmented rock rush down mountainsides
Garbage landslide
collapse of pile of garbage similar to natural landslide
avalanche
sudden, drastic flow of snow down a steep slope
River bank failure
natural phenomenon
rockfall
rocks fallen freely from a cliff, roof, or quarry