vapourousness vs vaporousness

vapourousness and vaporousness both are nouns.

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

As nouns, vapourousness and vaporousness are synonyms defined as:

vapourousness and vaporousness: cloudiness resulting from haze or mist or vapor

Other synonyms of vapourousness include haziness, mistiness, steaminess.

vapourousness (noun)	vaporousness (noun)
cloudiness resulting from haze or mist or vapor	cloudiness resulting from haze or mist or vapor