favourableness vs advantageousness

favourableness and advantageousness both are nouns.

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

As nouns, favourableness and advantageousness are synonyms defined as:

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

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

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