height vs stockiness

height and stockiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
height	Yes	No	No	No
stockiness	Yes	No	No	No

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

height: (of a standing person) the distance from head to foot
stockiness: The quality of being compact, sturdy, and relatively thick in build.

Other hyponyms of height include tallness, shortness.

height (noun)	stockiness (noun)
the vertical dimension of extension; distance from the base of something to the top	The quality of being compact, sturdy, and relatively thick in build.
(of a standing person) the distance from head to foot
elevation especially above sea level or above the earth's surface
the highest level or degree attainable; the highest stage of development