piquance vs piquantness

piquance and piquantness both are nouns.

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

As nouns, piquance and piquantness are synonyms defined as:

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

As nouns, piquance and piquantness are synonyms defined as:

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

Other synonyms of piquance include piquancy.

piquance (noun)	piquantness (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