6 letter words:
penner8,
5 letter words:
neper7,
penne7,
preen7,
renne5,
4 letter words:
neep6,
peen6,
peer6,
pene6,
pere6,
pern6,
pree6,
erne4,
nene4,
reen4,
3 letter words:
nep5,
pee5,
pen5,
per5,
pre5,
rep5,
een3,
ene3,
ere3,
ern3,
nee3,
ree3,
ren3,
2 letter words:
pe4,
ee2,
en2,
er2,
ne2,
re2,