Arbitrariness is a synonym of arbitrarity.
As nouns the difference between arbitrarity and arbitrariness
is that arbitrarity is the quality or state of being arbitrary while arbitrariness is the quality or state of being arbitrary.
arbitrarity
English
Noun
(en-noun)
The quality or state of being arbitrary.
Synonyms
* arbitrariness (much more common ) arbitrariness
Noun
(en-noun)
The quality or state of being arbitrary.
Synonyms
* arbitrarity (much less common )