I saw this question on another board, and it could be that there is no special word.
Let’s say someone comes up with a buzz-word for something, then retrofits words into the letters to try to make it meaningful for the abbreviation. You see them a lot at sporting events. (Like a Cowboys/Redskins game on CBS, some chucklehead is holding a sign that seat “Cowboys Beat Skins”)
Some examples from real life:
PR/SM (prounounced “prism”): a product by a major computer manufacturer allowing multiple operating systems on one mainframe box (not absolutely correct, but you see the point)
WIN: (from the 70s) Whip Inflation Now
COYOTE: Call Off Your Old Tired Ethics (a hooker organization)
*SHADO: Supreme Headquarters, Alien Defense Organization
(And some from my work)
RESPECT: (Trust me–it’s awful)
SACRED: (That’s even worse)
SMILE: Smiles make it [a] little easier
OK, you see what I mean. Is there such a word? “Retrogram” would be a good one. If it ever catches on, you heard it hear first (or at least, independently).
*OK, not exactly real life, but I’d bet that Gerry Anderson started with “Shadow,” then worked in words to fit it.