precipitance vs abruptness

precipitance and abruptness both are nouns.

Word	Noun	Adjective	Verb	Adverb
precipitance	Yes	No	No	No
abruptness	Yes	No	No	No

As nouns, precipitance and abruptness are synonyms defined as:

precipitance and abruptness: the quality of happening with headlong haste or without warning

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

precipitance (noun)	abruptness (noun)
the quality of happening with headlong haste or without warning	the quality of happening with headlong haste or without warning
	the property possessed by a slope that is very steep
	an abrupt discourteous manner