Apparition?

[snazzzybird]

No: HPFGUIDX 68566

Okay, this is a small thing, but it's bothering me.  In GoF, the act 
of Apparating is called "Apparition".  I like this because it sounds 
like a link to the Muggle use of the word, whose dictionary 
definitions are "a supernatural sight or thing; a ghost or phantom" 
and "the appearing of something strange, remarkable, or unexpected".

In OoP, however, that word is now given as "Apparation".  That usage 
makes sense as the noun form of "to Apparate" -- but it loses the 
link to the Muggle "apparition", and IMHO, that takes some if the fun 
out of it.  

--snazzzybird, who loves the wordplay in the Potterverse.