6 letter words:
operon8,
5 letter words:
porno7,
prone7,
4 letter words:
nope6,
open6,
peon6,
pone6,
poon6,
poor6,
pore6,
porn6,
repo6,
rope6,
3 letter words:
ope5,
pen5,
per5,
poo5,
pro5,
rep5,
eon3,
ern3,
noo3,
nor3,
one3,
ono3,
ore3,
roe3,
2 letter words:
op4,
pe4,
en2,
er2,
ne2,
no2,
oe2,
on2,
or2,
re2,
