8 letter words:
kipperer16,
7 letter words:
perkier13,
reekier11,
6 letter words:
zipper19,
prizer17,
kipper14,
keeper12,
reperk12,
peeper10,
reeker10,
ripper10,
peerie8,
eerier6,
5 letter words:
prize16,
kreep11,
piker11,
piper9,
prier7,
riper7,
eerie5,
4 letter words:
zerk17,
prez15,
keep10,
kepi10,
peek10,
peke10,
perk10,
pike10,
keir8,
kier8,
peep8,
perp8,
pipe8,
prep8,
reek8,
repp8,
epee6,
peer6,
pere6,
peri6,
pier6,
pree6,
ripe6,
3 letter words:
zek16,
zep14,
zip14,
zee12,
kep9,
kip9,
eek7,
eke7,
irk7,
kir7,
pep7,
pip7,
pee5,
per5,
pie5,
rep5,
rip5,
ere3,
err3,
ire3,
ree3,
rei3,
2 letter words:
ki6,
pe4,
pi4,
er2,
re2,