well, that home defense thing is tricky. the zombies might have body armor and stuff. i'm led to believe that people who tend to wear that stuff sweat at the idea of someone with a cross-bow on the other side of a door.
body armor typically is for bullets and all that. yah? doesn't stop arrows, cross bow bolts, blow darts, flechets, or spears well, eh?
make shift spears... just happen to have some sharpened rebar laying around. for your fencing projects

use two to practice two sword forms (just like in a book), or that single one to work out muscles.
do they make a bayonette for shotguns? some nasty armor wearing zombie, pound a few slugs in it, knock it down, poke holes in it, remember to remember to remove the head, and separate the limbs - zombies have that nasty habit to regenerate. find the magic sword and jewel, save the kingdom.
the one undervalued feature of a spear, or even a big stick... it's quiet.
bladite