piquance vs tanginess

piquance and tanginess both are nouns.

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

As nouns, piquance and tanginess are synonyms defined as:

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

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