For John, BLUF: In every group of people too large under existing coronavirus rules there is always someone who has a new word or a different use for a word you thought you knew. Nothing to see here; just move along.
I was on an EMail amongst my two Brothers and their friends, with a discussion of an AAR—After Action Report.
I referred to AAR as an Acronym. One of my Brothers' wisenheimer friends asked if it was an Acronym or if it was an Initialism. An Initialism? What kind of a woke expression is "Initialism"? Yes, Initialism is a word in the Dictionary.
I could see the distinction based on pronounceable and not pronounceable, but not using a world like "Initialism".
By the way, based upon my personal experience with AARs, I pronounce it Arrrgh.
Regards — Cliff