slimness vs slenderness

slimness and slenderness both are nouns.

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

As nouns, slimness and slenderness are synonyms defined as:

Other synonyms of slimness include slightness.

slimness (noun)	slenderness (noun)
the property of an attractively thin person	the quality of being slight or inadequate
a small margin	the property of an attractively thin person
	relatively small dimension through an object as opposed to its length or width