cloudiness vs turbidity

cloudiness and turbidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
cloudiness	Yes	No	No	No
turbidity	Yes	No	No	No

As nouns, turbidity is a hyponym of cloudiness; that is, turbidity is a word with a more specific, narrower meaning than cloudiness:

cloudiness: the quality of being cloudy
turbidity: muddiness created by stirring up sediment or having foreign particles suspended

Other hyponyms of cloudiness include turbidness, haziness, mistiness, steaminess, vaporousness, vapourousness.

cloudiness (noun)	turbidity (noun)
the quality of being cloudy	muddiness created by stirring up sediment or having foreign particles suspended
the state of the sky when it is covered by clouds
gloomy semidarkness caused by cloud cover