turbidness vs murkiness

turbidness and murkiness both are nouns.

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

As nouns, murkiness is a hypernym of turbidness; that is, murkiness is a word with a broader meaning than turbidness:

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

Other hypernyms of turbidness include cloudiness, muddiness.

turbidness (noun)	murkiness (noun)
muddiness created by stirring up sediment or having foreign particles suspended	the quality of being cloudy
	an atmosphere in which visibility is reduced because of a cloud of some substance