5 letter words:
iroko9,
koori9,
4 letter words:
koro8,
koto8,
rook8,
toko8,
took8,
riot4,
root4,
roti4,
roto4,
tiro4,
tori4,
toro4,
trio4,
3 letter words:
irk7,
kir7,
kit7,
koi7,
kor7,
oik7,
rok7,
oor3,
oot3,
ort3,
rit3,
roo3,
rot3,
too3,
tor3,
2 letter words:
ki6,
ko6,
io2,
it2,
oi2,
oo2,
or2,
ti2,
to2,