accessibility vs accessible

accessibility is a noun but accessible is not a noun.

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

accessibility (noun)	accessible (noun)
the quality of being at hand when needed
the attribute of being easy to meet or deal with

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