handiness vs accessibility

handiness and accessibility both are nouns.

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

As nouns, handiness and accessibility are synonyms defined as:

Other synonyms of handiness include availability, availableness.

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