fastness vs haste

fastness and haste both are nouns.

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

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

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

fastness (noun)	haste (noun)
a strongly fortified defensive structure	the act of moving hurriedly and in a careless manner
a rate (usually rapid) at which something happens	overly eager speed (and possible carelessness)
the quality of being fixed in place as by some firm attachment	a condition of urgency making it necessary to hurry