accessible vs availableness

accessible is not a noun while availableness is a noun.

Word	Noun	Adjective	Verb	Adverb
accessible	No	Yes	No	No
availableness	Yes	No	No	No

accessible (noun)	availableness (noun)
	the quality of being at hand when needed

accessible (adjective)	availableness (adjective)
capable of being reached
easy to get along with or talk to; friendly
easily obtained
capable of being read with comprehension