5 letter words:
kooky16,
rooky12,
rooty8,
4 letter words:
kook12,
roky11,
york11,
koro8,
koto8,
rook8,
toko8,
took8,
ryot7,
tory7,
toyo7,
troy7,
tyro7,
root4,
roto4,
toro4,
3 letter words:
yok10,
kor7,
rok7,
toy6,
try6,
oor3,
oot3,
ort3,
roo3,
rot3,
too3,
tor3,
2 letter words:
ky9,
ko6,
oy5,
yo5,
oo2,
or2,
to2,