6 letter words:
unroof9,
5 letter words:
korun9,
kroon9,
4 letter words:
zonk17,
zouk17,
orzo13,
ouzo13,
zoon13,
fork11,
funk11,
knur8,
nook8,
rook8,
four7,
roof7,
3 letter words:
zoo12,
kor7,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
noo3,
nor3,
ono3,
our3,
run3,
urn3,
2 letter words:
of5,
no2,
nu2,
on2,
or2,
un2,