Why is RAISERROR misspelled? Or is it not?

Question

Why isn\'t RAISERROR spelled RAISEERROR? Where is the second E? I could understand if it were some ancient keyword length constraint, but I would

Answer 1

Interesting - I've honestly never even noticed that before.

I would suspect that it's an early oversight that was just never corrected, though I'm a little surprised that support wasn't later added for RAISEERROR, with the mis-spelling left alone for compatibility.

Update: Aparently, there's even some internal confusion about what it ought to be - Check out this connect request, though MSFT didn't respond to it.