6 letter words:
cooper10,
5 letter words:
coper9,
cooer7,
4 letter words:
coop8,
cope8,
crop8,
poco8,
cero6,
core6,
poor6,
pore6,
repo6,
rope6,
3 letter words:
cep7,
cop7,
pec7,
coo5,
cor5,
ope5,
orc5,
per5,
poo5,
pro5,
rec5,
rep5,
roc5,
ore3,
roe3,
2 letter words:
op4,
pe4,
er2,
oe2,
or2,
re2,