spiciness vs tang

spiciness and tang both are nouns.

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

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

spiciness (noun)	tang (noun)
the property of being seasoned with spice and so highly flavored	any of various kelps especially of the genus Laminaria
behavior or language bordering on indelicacy	any of various coarse seaweeds
	brown algae seaweed with serrated edges
	a common rockweed used in preparing kelp and as manure
	a tart spicy quality
	the taste experience when a savoury condiment is taken into the mouth