precipitousness vs suddenness

precipitousness and suddenness both are nouns.

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

As nouns, precipitousness and suddenness are synonyms defined as:

precipitousness and suddenness: the quality of happening with headlong haste or without warning

Other synonyms of precipitousness include abruptness, precipitance, precipitancy, precipitateness.

precipitousness (noun)	suddenness (noun)
the property possessed by a slope that is very steep	the quality of happening with headlong haste or without warning
the quality of happening with headlong haste or without warning