8 letter words:
retorter8,
7 letter words:
fretter10,
6 letter words:
ferret9,
fetter9,
retore6,
retort6,
rotter6,
terret6,
terror6,
5 letter words:
fetor8,
forte8,
freer8,
frere8,
frore8,
ofter8,
refer8,
error5,
otter5,
retro5,
rotte5,
torte5,
toter5,
4 letter words:
feet7,
fere7,
fete7,
fore7,
fort7,
free7,
fret7,
froe7,
reef7,
reft7,
toft7,
tref7,
rete4,
rote4,
tore4,
torr4,
tort4,
tote4,
tree4,
tret4,
trot4,
3 letter words:
eft6,
fee6,
fer6,
fet6,
foe6,
for6,
fro6,
oft6,
ref6,
ere3,
err3,
ore3,
ort3,
ree3,
ret3,
roe3,
rot3,
tee3,
tet3,
toe3,
tor3,
tot3,
2 letter words:
ef5,
fe5,
of5,
er2,
et2,
oe2,
or2,
re2,
to2,