6 letter words:
refuge10,
fetter9,
refute9,
tufter9,
getter7,
gutter7,
tetter6,
5 letter words:
egret6,
greet6,
tutee5,
utter5,
4 letter words:
frug8,
feet7,
fere7,
fete7,
free7,
fret7,
reef7,
reft7,
tref7,
tuft7,
turf7,
eger5,
gree5,
grue5,
trug5,
urge5,
rete4,
tree4,
tret4,
true4,
3 letter words:
fug7,
eft6,
fee6,
fer6,
fet6,
feu6,
fur6,
ref6,
erg4,
gee4,
get4,
gut4,
reg4,
rug4,
teg4,
tug4,
ere3,
ree3,
ret3,
rue3,
rut3,
tee3,
tet3,
tut3,
ute3,
2 letter words:
ef5,
fe5,
er2,
et2,
re2,
ut2,