discretion vs powerfulness

discretion and powerfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
discretion	Yes	No	No	No
powerfulness	Yes	No	No	No

As nouns, powerfulness is a hypernym of discretion; that is, powerfulness is a word with a broader meaning than discretion:

discretion: the power of making free choices unconstrained by external agencies
powerfulness: possession of controlling influence

Other hypernyms of discretion include power.

discretion (noun)	powerfulness (noun)
the trait of judging wisely and objectively	possession of controlling influence
the power of making free choices unconstrained by external agencies
knowing how to avoid embarrassment or distress
refined taste; tact
freedom to act or judge on one's own