precipitancy vs precipitance

precipitancy and precipitance both are nouns.

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

As nouns, precipitancy and precipitance are synonyms defined as:

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

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

precipitancy (noun)	precipitance (noun)
the quality of happening with headlong haste or without warning	the quality of happening with headlong haste or without warning