vapourousness vs murkiness

vapourousness and murkiness both are nouns.

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

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

Other hypernyms of vapourousness include cloudiness, muddiness.

vapourousness (noun)	murkiness (noun)
cloudiness resulting from haze or mist or vapor	the quality of being cloudy
	an atmosphere in which visibility is reduced because of a cloud of some substance