Aberrance as a noun is state of being aberrant; a wandering from the right way; deviation from truth, rectitude, etc. while Aberrancy as a noun is aberrance. a wandering or deviating from the right way; especially, a deviation from truth or rectitude.
Part of speech: noun
Definition: State of being aberrant; a wandering from the right way; deviation from truth, rectitude, etc.
Part of speech: noun
Definition: Aberrance. A wandering or deviating from the right way; especially, a deviation from truth or rectitude.
We hope you now know whether to use Aberrance or Aberrancy in your sentence.