I've heard from others about the WO($\kappa$) as a counterpart of AC($\kappa$), but I cannot find a suitable way to express it in ZF since "every set of cardnality $\kappa$ can be well-ordered" is meaningless. Does WO($\kappa$) really exist?
I've found one. "Every set in $V_\kappa$ can be well-ordered." Is this right?