slimness vs narrowness

slimness and narrowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
slimness	Yes	No	No	No
narrowness	Yes	No	No	No

As nouns, slimness and narrowness are synonyms defined as:

Other synonyms of slimness include narrow margin.

slimness (noun)	narrowness (noun)
the property of an attractively thin person	the property of being narrow; having little width
a small margin	a small margin
	an inclination to criticize opposing opinions or shocking behavior
	a restriction of range or scope