fastness vs hurriedness

fastness and hurriedness both are nouns.

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

As nouns, hurriedness is a hyponym of fastness; that is, hurriedness is a word with a more specific, narrower meaning than fastness:

Other hyponyms of fastness include haste, hastiness, hurry, precipitation, execution speed, graduality, gradualness.

fastness (noun)	hurriedness (noun)
a strongly fortified defensive structure	overly eager speed (and possible carelessness)
a rate (usually rapid) at which something happens
the quality of being fixed in place as by some firm attachment