5 letter words:
plonk11,
kroon9,
orlop7,
porno7,
orlon5,
4 letter words:
knop10,
pork10,
kolo8,
look8,
nook8,
rook8,
loop6,
polo6,
pool6,
poon6,
poor6,
porn6,
loon4,
lorn4,
nolo4,
3 letter words:
kop9,
kor7,
lop5,
pol5,
poo5,
pro5,
loo3,
noo3,
nor3,
ono3,
2 letter words:
op4,
lo2,
no2,
on2,
or2,