What weapon(s) does Weapon Master (One Specific Weapon) cover?

[Kromm]

I'll echo what Peter and those who inspired him have already said. Weapon table entries are strictly for user convenience. The GM needs to exercise a bit of judgment and decide what is and isn't basically the same weapon. Of course making a broadsword pointy doesn't suddenly invalidate your WM (Broadsword), and of course WM (Katana) works with wooden as well as metal katanas (and ceramic ones, and hyperdense ones, and . . .). WM is a cinematic ability that doesn't play well with legalistic, pedantic readings. Go with spirit, not letter!