5 letter words:
korun9,
kroon9,
porno7,
4 letter words:
zonk17,
zouk17,
orzo13,
ouzo13,
zoon13,
knop10,
pork10,
punk10,
knur8,
nook8,
rook8,
poon6,
poor6,
porn6,
pour6,
roup6,
upon6,
3 letter words:
zoo12,
kop9,
kor7,
poo5,
pro5,
pun5,
pur5,
upo5,
urp5,
noo3,
nor3,
ono3,
our3,
run3,
urn3,
2 letter words:
op4,
up4,
no2,
nu2,
on2,
or2,
un2,