weponds for kill sevral a once:
exsplosives


advatages: killing mutilple zombies at once, some are pretty easy to make, good for clearing obstacals, oh and their fun.
disadvantages: great possiblity of personal injury, their loud, they definatly attract attention, could hurt or kill fellow survivers, must have ingredants to make them in the first place.
steam roller

advantages: great for mowing through crouds of zombies,good for carrying suplise to differnt locations
disavantages: unless its supped up its not gonna go fast enogh to keep the zombies from climbing on, requires fuel, not so easy to obtain, you might want to watch who you run over lest you want to add to the probblem.
cannons

advantages: creates shrapnal that has a good chance of lodgeing in someones head, should work ok as last resort
disadvantages: not really practical, takes to long to load, where are you gonna expect to get one of these
tanks

advantages: zombies should have trouble reaching you inside a tank, carrys your stuff, and is really cool.
disadvantages: can run out of fuel or flip over also i dount anyone but the army will be able to get their hands on a tank