taper vs convexity

taper and convexity both are nouns.

Word	Noun	Adjective	Verb	Adverb
taper	Yes	No	Yes	No
convexity	Yes	No	No	No

As nouns, convexity is a hypernym of taper; that is, convexity is a word with a broader meaning than taper:

Other hypernyms of taper include convex shape.

taper (noun)	convexity (noun)
stick of wax with a wick in the middle	the property possessed by a convex shape
a loosely woven cord (in a candle or oil lamp) that draws fuel by capillary action up into the flame	a shape that curves or bulges outward
the property possessed by a shape that narrows toward a point (as a wedge or cone)
a convex shape that narrows toward a point

taper (verb)	convexity (verb)
give a point to
diminish gradually