thinness vs poorness

thinness and poorness both are nouns.

Word	Noun	Adjective	Verb	Adverb
thinness	Yes	No	No	No
poorness	Yes	No	No	No

As nouns, poorness is a hypernym of thinness; that is, poorness is a word with a broader meaning than thinness:

Other hypernyms of thinness include exiguity, leanness, meagerness, meagreness, scantiness, scantness.

As nouns, poorness is a hypernym of thinness; that is, poorness is a word with a broader meaning than thinness:

Other hypernyms of thinness include exiguity, leanness, meagerness, meagreness, scantiness, scantness.

thinness (noun)	poorness (noun)
the property of having little body fat	the quality of being poorly made or maintained
relatively small dimension through an object as opposed to its length or width	less than adequate
a consistency of low viscosity	the quality of being meager
the property of being very narrow or thin	the state of having little or no money and few or no material possessions
the property of being scanty or scattered; lacking denseness
The property of lacking substance or strength.