5 letter words:
croup9,
4 letter words:
jock17,
jouk15,
juco13,
pock12,
puck12,
cork10,
pork10,
rock10,
ruck10,
coup8,
crop8,
pour6,
roup6,
3 letter words:
kop9,
cop7,
cup7,
kor7,
cor5,
cru5,
cur5,
orc5,
pro5,
pur5,
roc5,
upo5,
urp5,
our3,
2 letter words:
jo9,
op4,
up4,
or2,