poorness vs leanness

poorness and leanness both are nouns.

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

As nouns, poorness and leanness are synonyms defined as:

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

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