W rms or W RMS can be calculated, but is a meaning less number. If you are going to produce power amplifiers then it would be good to learn the correct use of these terms. It would also be a service to others who also often misuse these terms. Watts rms is a particularly unfortunate term because it results from an actual, although meaningless, calculation.
Even PS Audio, run by Paul McGowan who you called an idiot, or was it stupid, in another thread, uses the correct term.
Watt, Watt rms, Watt RMS, W rms, w rms, and similar variations are incorrect.
Bob Cordell, in his book, Designing Audio Power Amplifiers, 2nd Edition, uses the term, "Continuous average sine wave power." That's a mouthful, but just power or average power or just plain W or watt, seems good. W rms is not correct and should be avoided.
A or amp is correct
Amp, or Amps, or the like is incorrect.
ohm is correct
Ohm or Ohms, or the like is incorrect
In technical writing adding an "s" to the units (ohm to ohms) is also incorrect, but is so common that it isn't worth noting.