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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

phenomenon go
any state or process known through the senses rather than by intuition or reasoning

natural phenomenon go
all phenomena that are not artificial

physical phenomenon go
a natural phenomenon involving the physical properties of matter and energy

cloud
any collection of particles (e.g., smoke or dust) or gases that is visible

noun.phenomenon

6 Subcategories

coma go
(astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet
nebula go
an immense cloud of gas (mainly hydrogen) and dust in interstellar space
aerosol go
a cloud of solid or liquid particles in a gas
cosmic dust go
clouds of particles or gases occurring throughout interstellar space
dust cloud go
a cloud of dust suspended in the air
mushroom, mushroom cloud, mushroom-shaped cloud go
a large cloud of rubble and dust shaped like a mushroom and rising into the sky after an explosion (especially of a nuclear bomb)