unfavourable vs unfavourableness

unfavourable is not a noun while unfavourableness is a noun.

Word	Noun	Adjective	Verb	Adverb
unfavourable	No	Yes	No	No
unfavourableness	Yes	No	No	No

unfavourable (noun)	unfavourableness (noun)
	the quality of not being encouraging or indicative of success

unfavourable (adjective)	unfavourableness (adjective)
(of winds or weather) tending to hinder or oppose
not encouraging or approving or pleasing
involving or creating circumstances detrimental to success or effectiveness