procrastination vs slowness

procrastination and slowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
procrastination	Yes	No	No	No
slowness	Yes	No	No	No

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

Other hypernyms of procrastination include deliberateness, deliberation, unhurriedness.

procrastination (noun)	slowness (noun)
the act of procrastinating; putting off or delaying or deferring an action to a later time	a rate demonstrating an absence of haste or hurry
slowness as a consequence of not getting around to it	lack of normal development of intellectual capacities
	unskillfulness resulting from a lack of training