tallness vs height

tallness and height both are nouns.

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

As nouns, tallness and height are synonyms defined as:

tallness and height: the vertical dimension of extension; distance from the base of something to the top

As nouns, height is a hypernym of tallness; that is, height is a word with a broader meaning than tallness:

Other hypernyms of tallness include stature.

tallness (noun)	height (noun)
the vertical dimension of extension; distance from the base of something to the top	the vertical dimension of extension; distance from the base of something to the top
the property of being taller than average stature	(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