6 letter words:
fetter9,
trevet9,
vetter9,
5 letter words:
fever11,
evert8,
revet8,
4 letter words:
ever7,
feet7,
fere7,
fete7,
free7,
fret7,
reef7,
reft7,
tref7,
veer7,
vert7,
rete4,
tree4,
tret4,
3 letter words:
eft6,
eve6,
fee6,
fer6,
fet6,
ref6,
rev6,
vee6,
vet6,
ere3,
ree3,
ret3,
tee3,
tet3,
2 letter words:
ef5,
fe5,
er2,
et2,
re2,