9 letter words:
precooker17,
7 letter words:
precook15,
prerock15,
crooker13,
6 letter words:
pecker14,
cooker12,
corker12,
porker12,
recook12,
recork12,
reperk12,
rocker12,
cooper10,
poorer8,
5 letter words:
creek11,
crook11,
kreep11,
ocker11,
pekoe11,
poker11,
coper9,
creep9,
crepe9,
cooee7,
cooer7,
corer7,
crore7,
repro7,
roper7,
4 letter words:
peck12,
pock12,
coke10,
cook10,
cork10,
keep10,
peek10,
peke10,
perk10,
poke10,
pork10,
reck10,
rock10,
cepe8,
coop8,
cope8,
crop8,
kore8,
poco8,
reek8,
rook8,
cere6,
cero6,
core6,
peer6,
pere6,
poor6,
pore6,
pree6,
repo6,
rope6,
3 letter words:
kep9,
kop9,
cep7,
cop7,
eek7,
eke7,
kor7,
oke7,
pec7,
cee5,
coo5,
cor5,
ope5,
orc5,
pee5,
per5,
poo5,
pro5,
rec5,
rep5,
roc5,
ere3,
err3,
ore3,
ree3,
roe3,
2 letter words:
op4,
pe4,
er2,
oe2,
or2,
re2,