6 letter words:
feutre9,
refute9,
5 letter words:
freet8,
terfe8,
4 letter words:
feer7,
feet7,
fere7,
fete7,
free7,
fret7,
reef7,
reft7,
terf7,
tref7,
turf7,
rete4,
teer4,
tree4,
true4,
3 letter words:
eft6,
erf6,
fee6,
fer6,
fet6,
feu6,
fur6,
ref6,
tef6,
ere3,
ree3,
ret3,
rue3,
rut3,
tee3,
ure3,
ute3,
2 letter words:
ef5,
fe5,
ee2,
er2,
et2,
re2,
te2,
ur2,
ut2,