Misuse of martial arts words, terms, titles

Another area if martial arts terms being mistakenly use are listed here.

Bo staff (Bo and staff mean almost the same thing. The word Bo or Staff is all that is needed)

Katana sword (Katana means sword, so Katana or sword is ok, but both together is incorrect)

Sensei XYZ (The correct way to use the title Sensei is to place it after the name, example: XYZ Sensei. The same holds true of any title. Example XYZ Shihan, instead of Shihan XYZ)