graduality vs fastness

graduality and fastness both are nouns.

Word	Noun	Adjective	Verb	Adverb
graduality	Yes	No	No	No
fastness	Yes	No	No	No

As nouns, fastness is a hypernym of graduality; that is, fastness is a word with a broader meaning than graduality:

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

Other hypernyms of graduality include speed, swiftness.

graduality (noun)	fastness (noun)
the quality of being gradual or of coming about by gradual stages	a strongly fortified defensive structure
	a rate (usually rapid) at which something happens
	the quality of being fixed in place as by some firm attachment