fall
downwards motion, under the influence of gravity
raining animals
rare meteorological phenomenon
free fall
motion of a body where its weight is the only force acting upon it; any motion of a body where gravity is the only force acting upon it
settling
process where suspended particulates drift towards the bottom of a fluid
slide
mass movement of rock, soil, mud, or snow under the force of gravity
rockfall
rocks fallen freely from a cliff, roof, or quarry