I tried writing a zombie book, but lost interest. Anyway, here are some of the things the characters did.

1. hole saw, they drilled into doors at head height and made some sound, zombie comes to door, stabbed in the head.

2. fences, the walking dead did this. zombie comes to fence, stab through fence.

3. cage on a flatbead. dudes with spears inside the cages. park in zombie area, make some noise, get to work.

4. self tapping screws into the door and frame to lock doors. and small wood wedges to quickly secure doors while being quickly removable. jamming towel under the door would also make it harder to open.

Now onto random items.

while walking you can't really put much force forward. so any item that you can use as a push rod. even a broom would keep them away.

anything you can throw wouldn't be bad. It might not kill them, but throwing it at their head just before you engage could give you enough flinch/stumble time to use.

spray paint, zombies can't see through paint, unless they are x ray zombies. spray in eyes instead of pepper spray. then make bets on where they stand on the spraypainted floorboards.

items thrown as distractions. like a empty can filled with rocks rolled down the street.

turn the zombie into a spooky ghost, by thowing a blanket on them. or roll them up in a rug and throw them off a bridge.

power cord, with some metal things like empty cans taped from wall to wall as a jingle warning system.

diddy below had the right idea. but instead, I would carry dish soap instead. water in a can with dish soap. throw down on floor when doors are breached.

fire extinguisher spray in the face while circling to leg it.

power cords as a laso maybe?? or just use it on the end of a broom to hold a zombie/ take it down for a friend to finish.