6 letter words:
rooter6,
torero6,
5 letter words:
retro5,
rotor5,
4 letter words:
root4,
rore4,
rort4,
rote4,
roto4,
tore4,
toro4,
torr4,
3 letter words:
err3,
oor3,
oot3,
ore3,
ort3,
reo3,
ret3,
roe3,
roo3,
rot3,
toe3,
too3,
tor3,
2 letter words:
er2,
et2,
oe2,
oo2,
or2,
re2,
te2,
to2,
