5 letter words:
croak11,
koura9,
4 letter words:
cark10,
cauk10,
cork10,
rack10,
rock10,
ruck10,
karo8,
kora8,
koru8,
okra8,
raku8,
arco6,
cour6,
orca6,
urao4,
3 letter words:
ark7,
auk7,
koa7,
kor7,
oak7,
oka7,
ouk7,
rok7,
arc5,
car5,
cor5,
cru5,
cur5,
oca5,
orc5,
roc5,
ruc5,
oar3,
ora3,
our3,
2 letter words:
ka6,
ko6,
ar2,
or2,
ou2,
ur2,