Q. Didn't TSR trademark the word "Nazi"?
A. It may seem bizarre to include such a specific question in a FAQ, but
the number of times the thing comes up really does justify it.
The quick answer is "no." What seems to have happened is that TSR's old
"Indiana Jones" game included an illustration or cardboard figure of a Nazi
soldier (as a villain), with a "TM" symbol next to the word. The myth grew
from there. However, what was being trademarked was NOT the word, but the
associated image. Furthermore, the trademarks in that product were claimed,
not by TSR, but by Lucasfilm (makers of the Indiana Jones movies).