sharpness vs spiciness

sharpness and spiciness both are nouns.

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

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

Other hypernyms of sharpness include spice, spicery.

sharpness (noun)	spiciness (noun)
harshness of manner	the property of being seasoned with spice and so highly flavored
thinness of edge or fineness of point	behavior or language bordering on indelicacy
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