lowness vs tallness

lowness and tallness both are nouns.

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

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

lowness: the quality of being low; lacking height
tallness: the vertical dimension of extension; distance from the base of something to the top

Other hypernyms of lowness include height.

lowness (noun)	tallness (noun)
the quality of being low; lacking height	the vertical dimension of extension; distance from the base of something to the top
a low or small degree of any quality (amount or force or temperature etc.)	the property of being taller than average stature
a feeling of low spirits
a position of inferior status; low in station or rank or fortune or estimation