7 letter words:
cropper13,
6 letter words:
copper12,
cooper10,
proper10,
poorer8,
5 letter words:
coper9,
preop9,
cooer7,
corer7,
crore7,
repro7,
roper7,
4 letter words:
coop8,
cope8,
crop8,
pepo8,
perp8,
poco8,
poop8,
pope8,
prep8,
prop8,
repp8,
cero6,
core6,
poor6,
pore6,
repo6,
rope6,
3 letter words:
cep7,
cop7,
pec7,
pep7,
pop7,
coo5,
cor5,
ope5,
orc5,
per5,
poo5,
pro5,
rec5,
rep5,
roc5,
err3,
ore3,
roe3,
2 letter words:
op4,
pe4,
er2,
oe2,
or2,
re2,