margin vs slimness

margin and slimness both are nouns.

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

As nouns, slimness is a hyponym of margin; that is, slimness is a word with a more specific, narrower meaning than margin:

Other hyponyms of margin include margin of error, margin of safety, safety margin, narrow margin, narrowness.

margin (noun)	slimness (noun)
an amount beyond the minimum necessary	the property of an attractively thin person
a permissible difference; allowing some freedom to move within limits	a small margin
the blank space that surrounds the text on a page
the amount of collateral a customer deposits with a broker when borrowing from the broker to buy securities
(finance) the net sales minus the cost of goods and services sold
the boundary line or the area immediately inside the boundary