limitless vs limitlessness

limitless is not a noun while limitlessness is a noun.

Word	Noun	Adjective	Verb	Adverb
limitless	No	Yes	No	No
limitlessness	Yes	No	No	No

limitless (noun)	limitlessness (noun)
	the quality of being infinite; without bound or limit

limitless (adjective)	limitlessness (adjective)
having no limits in range or scope
without limits in extent or size or quantity
seemingly boundless in amount, number, degree, or especially extent