cloudiness vs murkiness

cloudiness and murkiness both are nouns.

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

As nouns, cloudiness and murkiness are synonyms defined as:

Other synonyms of cloudiness include muddiness.

cloudiness (noun)	murkiness (noun)
the quality of being cloudy	the quality of being cloudy
the state of the sky when it is covered by clouds	an atmosphere in which visibility is reduced because of a cloud of some substance
gloomy semidarkness caused by cloud cover