spiciness vs sharpness

spiciness and sharpness both are nouns.

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

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

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

spiciness (noun)	sharpness (noun)
the property of being seasoned with spice and so highly flavored	harshness of manner
behavior or language bordering on indelicacy	thinness of edge or fineness of point
	a strong odor or taste property
	the quality of being sharp and clear
	the attribute of urgency in tone of voice
	the quality of being keenly and painfully felt
	a quick and penetrating intelligence