vapourousness vs cloudiness

vapourousness and cloudiness both are nouns.

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

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

Other hypernyms of vapourousness include muddiness, murkiness.

vapourousness (noun)	cloudiness (noun)
cloudiness resulting from haze or mist or vapor	the quality of being cloudy
	the state of the sky when it is covered by clouds
	gloomy semidarkness caused by cloud cover