6 letter words:
perked13,
5 letter words:
kreep11,
preed8,
4 letter words:
keep10,
peek10,
peke10,
perk10,
deke9,
drek9,
eked9,
reek8,
deep7,
peed7,
peer6,
pere6,
pree6,
deer5,
dere5,
dree5,
rede5,
reed5,
3 letter words:
kep9,
eek7,
eke7,
ped6,
pee5,
per5,
rep5,
dee4,
red4,
ere3,
ree3,
2 letter words:
pe4,
de3,
ed3,
er2,
re2,