decisiveness vs firmness

decisiveness and firmness both are nouns.

Word	Noun	Adjective	Verb	Adverb
decisiveness	Yes	No	No	No
firmness	Yes	No	No	No

As nouns, firmness is a hypernym of decisiveness; that is, firmness is a word with a broader meaning than decisiveness:

decisiveness: the trait of resoluteness as evidenced by firmness of character or purpose
firmness: the trait of being resolute

Other hypernyms of decisiveness include firmness of purpose, resoluteness, resolution, resolve.

decisiveness (noun)	firmness (noun)
the trait of resoluteness as evidenced by firmness of character or purpose	the quality of being steady or securely and immovably fixed in place
the quality of being final or definitely settled	the trait of being resolute
	the property of being unyielding to the touch
	the muscle tone of healthy tissue