murk vs murkiness

murk and murkiness both are nouns.

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

As nouns, murk and murkiness are synonyms defined as:

murk and murkiness: an atmosphere in which visibility is reduced because of a cloud of some substance

Other synonyms of murk include fog, fogginess.

murk (noun)	murkiness (noun)
an atmosphere in which visibility is reduced because of a cloud of some substance	the quality of being cloudy
	an atmosphere in which visibility is reduced because of a cloud of some substance

murk (verb)	murkiness (verb)
make dark, dim, or gloomy