lowness vs stubbiness

lowness and stubbiness both are nouns.

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

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

Other hyponyms of lowness include squatness, shortness, truncation.

lowness (noun)	stubbiness (noun)
the quality of being low; lacking height	the property of being short and broad
a low or small degree of any quality (amount or force or temperature etc.)
a feeling of low spirits
a position of inferior status; low in station or rank or fortune or estimation