types:
ascension
(astronomy) the rising of a star above the horizon
circulation
free movement or passage (as of cytoplasm within a cell or sap through a plant)
creep
a slow longitudinal movement or deformation
gravitation
movement downward resulting from gravitational attraction
flow,
flowing
the motion characteristic of fluids (liquids or gases)
spread,
spreading
process or result of distributing or extending over a wide expanse of space
stampede
a wild headlong rush of frightened animals (horses or cattle)
diffusion
the spread of social institutions (and myths and skills) from one society to another
invasion
(pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body
irradiation
(physiology) the spread of sensory neural impulses in the cortex
drop,
fall
a free and rapid descent by the force of gravity
lightening
descent of the uterus into the pelvic cavity that occurs late in pregnancy; the fetus is said to have dropped
set
the descent of a heavenly body below the horizon
cascade,
shower
a sudden downpour (as of tears, sparks, etc.) likened to a rain shower
sinking
a descent as through liquid (especially through water)
climb,
climbing,
mounting
an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
heave,
heaving
an upward movement (especially a rhythmical rising and falling)
liftoff
the initial ascent of a rocket from its launching pad
takeoff
the initial ascent of an airplane as it becomes airborne
slide
(geology) the descent of a large mass of earth or rocks or snow etc.
current,
stream
a steady flow of a fluid (usually from natural causes)
freshet,
spate
the occurrence of a water flow resulting from sudden rain or melting snow
drippage,
dripping
a liquid (as water) that flows in drops (as from the eaves of house)
emission
the occurrence of a flow of water (as from a pipe)
radiation
the spread of a group of organisms into new habitats