6 letter words:
operon8,
5 letter words:
kopje18,
joker16,
rejon12,
poker11,
proke11,
pronk11,
krone9,
kroon9,
porno7,
prone7,
roneo5,
4 letter words:
jerk15,
joke15,
jook15,
jeon11,
knop10,
penk10,
perk10,
poke10,
ponk10,
pook10,
pork10,
keno8,
kern8,
kero8,
kore8,
koro8,
nerk8,
nook8,
nork8,
renk8,
roke8,
rook8,
noop6,
nope6,
open6,
peon6,
pern6,
pone6,
poon6,
poor6,
pore6,
porn6,
proo6,
repo6,
roop6,
rope6,
oner4,
rone4,
roon4,
3 letter words:
joe10,
jor10,
kep9,
kop9,
erk7,
ken7,
kon7,
kor7,
nek7,
oke7,
rok7,
nep5,
oop5,
ope5,
pen5,
per5,
poo5,
pre5,
pro5,
rep5,
eon3,
ern3,
noo3,
nor3,
one3,
ono3,
oon3,
oor3,
ore3,
ren3,
reo3,
roe3,
roo3,
2 letter words:
jo9,
ko6,
op4,
pe4,
po4,
en2,
er2,
ne2,
no2,
oe2,
on2,
oo2,
or2,
re2,