scrawniness vs skinniness

scrawniness and skinniness both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrawniness	Yes	No	No	No
skinniness	Yes	No	No	No

As nouns, scrawniness and skinniness are synonyms defined as:

scrawniness (noun)	skinniness (noun)
the bodily property of lacking flesh	the bodily property of lacking flesh
the property of being stunted and inferior in size or quality