6 letter words:
cocker14,
recock14,
5 letter words:
crock13,
ocker11,
recco9,
4 letter words:
cock12,
coke10,
cork10,
reck10,
rock10,
croc8,
ecco8,
kero8,
kore8,
roke8,
cero6,
core6,
3 letter words:
erk7,
kor7,
oke7,
rok7,
cor5,
eco5,
orc5,
rec5,
roc5,
ore3,
reo3,
roe3,
2 letter words:
ko6,
er2,
oe2,
or2,
re2,