murkiness vs turbidity

murkiness and turbidity both are nouns.

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

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

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

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

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