6 letter words:
retook10,
5 letter words:
toker9,
troke9,
4 letter words:
kero8,
keto8,
kore8,
koro8,
koto8,
roke8,
rook8,
toke8,
toko8,
took8,
trek8,
root4,
rote4,
roto4,
tore4,
toro4,
3 letter words:
erk7,
ket7,
kor7,
oke7,
rok7,
oor3,
oot3,
ore3,
ort3,
reo3,
ret3,
roe3,
roo3,
rot3,
toe3,
too3,
tor3,
2 letter words:
ko6,
er2,
et2,
oe2,
oo2,
or2,
re2,
te2,
to2,