accessibility vs availability

accessibility and availability both are nouns.

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

As nouns, accessibility and availability are synonyms defined as:

accessibility and availability: the quality of being at hand when needed

Other synonyms of accessibility include availableness, handiness.

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