favourableness vs favorableness

favourableness and favorableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
favourableness	Yes	No	No	No
favorableness	Yes	No	No	No

As nouns, favourableness and favorableness are synonyms defined as:

favourableness and favorableness: the quality of being encouraging or promising of a successful outcome

Other synonyms of favourableness include advantageousness, positiveness, positivity, profitableness.

favourableness (noun)	favorableness (noun)
the quality of being encouraging or promising of a successful outcome	the quality of being encouraging or promising of a successful outcome