propitiousness vs positiveness

propitiousness and positiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
propitiousness	Yes	No	No	No
positiveness	Yes	No	No	No

As nouns, positiveness is a hypernym of propitiousness; that is, positiveness is a word with a broader meaning than propitiousness:

propitiousness: the favorable quality of strongly indicating a successful result
positiveness: the quality of being encouraging or promising of a successful outcome

Other hypernyms of propitiousness include advantageousness, favorableness, favourableness, positivity, profitableness.

propitiousness (noun)	positiveness (noun)
the favorable quality of strongly indicating a successful result	a quality or state characterized by certainty or acceptance or affirmation and dogmatic assertiveness
	the quality of being encouraging or promising of a successful outcome
	the quality of being undeniable and not worth arguing about
	an amount greater than zero
	the character of the positive electric pole