pungency vs spiciness

pungency and spiciness both are nouns.

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

As nouns, spiciness is a hypernym of pungency; that is, spiciness is a word with a broader meaning than pungency:

Other hypernyms of pungency include spice, spicery.

pungency (noun)	spiciness (noun)
a strong odor or taste property	the property of being seasoned with spice and so highly flavored
wit having a sharp and caustic quality	behavior or language bordering on indelicacy