5 letter words:
iroko9,
koori9,
4 letter words:
firk11,
fork11,
work11,
frow10,
woof10,
koro8,
rook8,
roof7,
3 letter words:
kif10,
kow10,
wok10,
wof9,
irk7,
kir7,
koi7,
kor7,
oik7,
rok7,
fir6,
for6,
fro6,
oof6,
orf6,
rif6,
row6,
woo6,
oor3,
roo3,
2 letter words:
ki6,
ko6,
if5,
of5,
ow5,
wo5,
io2,
oi2,
oo2,
or2,