spiciness vs tanginess

spiciness and tanginess both are nouns.

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

As nouns, tanginess is a hyponym of spiciness; that is, tanginess is a word with a more specific, narrower meaning than spiciness:

Other hyponyms of spiciness include bite, pungency, raciness, sharpness, nip, piquance, piquancy, piquantness, tang, zest, hotness, pepperiness.

spiciness (noun)	tanginess (noun)
the property of being seasoned with spice and so highly flavored	a tart spicy quality
behavior or language bordering on indelicacy