6 letter words:
kibitz21,
5 letter words:
zimbi18,
4 letter words:
zimb17,
ziti13,
buik10,
kuti8,
tiki8,
muti6,
3 letter words:
biz14,
miz14,
zit12,
bum7,
kit7,
mib7,
bit5,
but5,
mut5,
tub5,
tum5,
tui3,
2 letter words:
ki6,
bi4,
mi4,
mu4,
um4,
it2,
ti2,
ut2,