availableness vs handiness

availableness and handiness both are nouns.

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

As nouns, availableness and handiness are synonyms defined as:

Other synonyms of availableness include accessibility, availability.

availableness (noun)	handiness (noun)
the quality of being at hand when needed	the quality of being at hand when needed
	skillfulness with the hands