Abhava versus Vibhava Is there a difference between abhava and vibhava? Or are those words synonyms?

When they are not synonyms, what is their exact meaning.
Let's assume that bhava means "existence".

I think that the a prefix means "not" (it appears in a lot of Buddhist words, like anatta and so on).

I think that the vi prefix might mean "the reverse of" (see e.g. the dictionary definition quoted here).

So my guess is that abhava means "non-existence", whereas vibhava means "destruction".

The phrase vibhavataṇhā is used in the definition of the second noble truth in SN 56.11, so you can read various translations of vibhava in the various translations of that sutta, for example:


  
  craving for extermination (of what is not liked)
  craving for non-being
  craving for non-existence (self-annihilation)
  craving for non-becoming
  craving for non-existence [for extinction].
  


The first translation of SN 56.11 that I read translated bhavataṇhā and vibhavataṇhā as "the craving to live and even the craving to die", so that's the way I remember it.

In summary, maybe they mean the same thing (i.e. "non-existence"); but if they aren't synonyms, then one simply means "non-existence" and the other implies a "transition from existence to non-existence" for example "annihilation, destruction, extinction, death".