gradualness vs swiftness

gradualness and swiftness both are nouns.

Word	Noun	Adjective	Verb	Adverb
gradualness	Yes	No	No	No
swiftness	Yes	No	No	No

As nouns, swiftness is a hypernym of gradualness; that is, swiftness is a word with a broader meaning than gradualness:

gradualness: the quality of being gradual or of coming about by gradual stages
swiftness: a rate (usually rapid) at which something happens

Other hypernyms of gradualness include fastness, speed.

gradualness (noun)	swiftness (noun)
the quality of being gradual or of coming about by gradual stages	a rate (usually rapid) at which something happens
the property possessed by a slope that is very gradual