[micksabox]

Yes, the term now is UAP, unidentified aerial phenomenon. There is an official UAP Task Force in the Pentagon. Former Senate Majority Leader Harry Reid uses it, Hilary Clinton uses it.

[nayaketo]

"Ariel phenomenon" sounds like the kind of word that will be very quickly co-opted by paranormalists and occultists.

[at_a_remove]

You can run as fast as you like on the Euphemism Treadmill, but you won't get anywhere.