tanginess vs piquance

tanginess and piquance both are nouns.

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

As nouns, tanginess and piquance are synonyms defined as:

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

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