Diffusion.
"Darkness" is a good one.
sparkle, light, illuminate, glow, shine, glitter, glint, flash, blink
The Hawaiian word for light is "mālamalama."
Another word for galaxy is "star system" or "stellar system."
Another name for the light microscope is the optical microscope.
How about " contraction" ? Or you could have hemoglobin reactional dispersal of sperm
Another word for "light" as in not heavy is "lightweight."
dispersal, scattering
The runaway reactor at Chernobyl went subcritical by prompt dispersal.
I think you meant dispersal, not disperal.Early methods for seed dispersal were not very effective.
Not heavy, soft
illuminate
dim
Cyan.
Enlighten.
Refraction
solar