The same way you could walk around as you shoot with your gun. Are there any swords like this?
Sword that lets you walk around while you attack?
Do the Cutter and Spur count?
If not, does the Warmaster Rocket Hammer count?
All swords let you move while attacking, but the attacking animation takes over your movement, if that's what you mean.
In the case of Warmaster Rocket Hammer, you can actually move around the dungeon quite quickly by just attacking empty space over and over again. (It's about as fast as normal running, depending on your attack speed increase.)
ASI: MAX. Muahahahahaahahaha!
But yeah, like Bopp said. Nothing that let's you freewalk like a gun does.
There are none, and @Travelliath, no, Rockethammer does not count. It's not teally walking while you use the second attack on the combo which is dash.
They're called guns. In fact, there's a cool bug you can exploit to gain machine-gun like infinite combo capacity for your long-range moving swords called Alchemers. They inflict useful statuses on normal hit too, very powerful.
considering its really difficult id rather call it a skill than a bug, weapon switching that is.
Nope.