6 letter words:
unprop10,
5 letter words:
pronk11,
korun9,
kroon9,
porno7,
4 letter words:
knop10,
ponk10,
pook10,
pork10,
pouk10,
punk10,
knur8,
koro8,
koru8,
nook8,
nork8,
oppo8,
poop8,
prop8,
rook8,
noop6,
noup6,
poon6,
poor6,
porn6,
pour6,
proo6,
roop6,
roup6,
upon6,
ourn4,
roon4,
3 letter words:
kop9,
kon7,
kor7,
ouk7,
pop7,
pup7,
rok7,
oop5,
oup5,
poo5,
pro5,
pun5,
pur5,
upo5,
urp5,
noo3,
nor3,
nur3,
ono3,
oon3,
oor3,
our3,
roo3,
run3,
urn3,
2 letter words:
ko6,
op4,
po4,
up4,
no2,
nu2,
on2,
oo2,
or2,
ou2,
un2,
ur2,