leanness vs poorness

leanness and poorness both are nouns.

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

As nouns, leanness and poorness are synonyms defined as:

Other synonyms of leanness include exiguity, meagerness, meagreness, scantiness, scantness.

leanness (noun)	poorness (noun)
the property of having little body fat	the quality of being poorly made or maintained
the quality of being meager	less than adequate
	the quality of being meager
	the state of having little or no money and few or no material possessions