suddenness vs haste

suddenness and haste both are nouns.

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

As nouns, haste is a hypernym of suddenness; that is, haste is a word with a broader meaning than suddenness:

Other hypernyms of suddenness include hastiness, hurriedness, hurry, precipitation.

suddenness (noun)	haste (noun)
the quality of happening with headlong haste or without warning	the act of moving hurriedly and in a careless manner
	overly eager speed (and possible carelessness)
	a condition of urgency making it necessary to hurry