heavy-handedness vs slowness

heavy-handedness and slowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
heavy-handedness	Yes	No	No	No
slowness	Yes	No	No	No

As nouns, slowness is a hypernym of heavy-handedness; that is, slowness is a word with a broader meaning than heavy-handedness:

heavy-handedness: The property of being clumsy and awkward, and thus excessive.
slowness: unskillfulness resulting from a lack of training

Other hypernyms of heavy-handedness include awkwardness, clumsiness, ineptitude, ineptness, maladroitness.

heavy-handedness (noun)	slowness (noun)
The property of being clumsy and awkward, and thus excessive.	a rate demonstrating an absence of haste or hurry
	lack of normal development of intellectual capacities
	unskillfulness resulting from a lack of training