piquance vs piquancy

piquance and piquancy both are nouns.

Word	Noun	Adjective	Verb	Adverb
piquance	Yes	No	No	No
piquancy	Yes	No	No	No

As nouns, piquance and piquancy are synonyms defined as:

Other synonyms of piquance include nip, piquantness, tang, tanginess, zest.

As nouns, piquance and piquancy are synonyms defined as:

piquance and piquancy: the quality of being agreeably stimulating or mentally exciting

Other synonyms of piquance include piquantness.

piquance (noun)	piquancy (noun)
a tart spicy quality	a tart spicy quality
the quality of being agreeably stimulating or mentally exciting	the quality of being agreeably stimulating or mentally exciting