marginal vs marginality

marginal is not a noun while marginality is a noun.

Word	Noun	Adjective	Verb	Adverb
marginal	No	Yes	No	No
marginality	Yes	No	No	No

marginal (noun)	marginality (noun)
	the property of being marginal or on the fringes

marginal (adjective)	marginality (adjective)
of questionable or minimal quality
just barely adequate or within a lower limit
at or constituting a border or edge
producing at a rate that barely covers production costs