piquantness vs tanginess

piquantness and tanginess both are nouns.

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

As nouns, piquantness and tanginess are synonyms defined as:

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

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