different between cloudiness vs nebulosity

English

cloudy +? -ness

cloudiness (countable and uncountable, plural cloudinesses)

The state of being cloudy (e.g. weather).
Expect considerable cloudiness with occasional rain showers.
The property of being murky (e.g. liquid, style).
Cloudiness in the water is most often caused in new aquariums by white bacteria.
The property of being obscure (e.g. information).
Avoid cloudiness in your essay-writing.

From Latin nebulositas.

nebulosity (countable and uncountable, plural nebulosities)

(meteorology, astronomy) The characteristic of being nebulous; cloudiness (measured in octas).

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