pointless vs pointlessness

pointless is not a noun while pointlessness is a noun.

Word	Noun	Adjective	Verb	Adverb
pointless	No	Yes	No	No
pointlessness	Yes	No	No	No

pointless (noun)	pointlessness (noun)
	total lack of meaning or ideas

pointless (adjective)	pointlessness (adjective)
not having a point especially a sharp point
having no points scores
serving no useful purpose; having no excuse for being