precipitance vs precipitancy

precipitance and precipitancy both are nouns.

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

As nouns, precipitance and precipitancy are synonyms defined as:

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

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

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