5 letter words:
kazoo18,
croak11,
crook11,
karoo9,
4 letter words:
czar15,
orzo13,
cark10,
cook10,
cork10,
rack10,
rock10,
kora8,
okra8,
rook8,
arco6,
orca6,
3 letter words:
coz14,
azo12,
zoa12,
zoo12,
ark7,
koa7,
kor7,
oak7,
oka7,
arc5,
car5,
coo5,
cor5,
oca5,
orc5,
roc5,
oar3,
ora3,
2 letter words:
za11,
ka6,
ar2,
or2,