7 letter words:
befrets12,
6 letter words:
befret11,
bereft11,
fester9,
freest9,
berets8,
5 letter words:
teffs11,
beefs10,
feebs10,
feres8,
fetes8,
frees8,
frets8,
reefs8,
beers7,
beets7,
beret7,
beset7,
brees7,
ester5,
reest5,
reset5,
steer5,
stere5,
terse5,
trees5,
4 letter words:
effs10,
teff10,
beef9,
feeb9,
efts7,
fees7,
feet7,
fere7,
fest7,
fete7,
fets7,
free7,
fret7,
reef7,
refs7,
reft7,
serf7,
tref7,
beer6,
bees6,
beet6,
best6,
bets6,
bree6,
rebs6,
erst4,
rees4,
rest4,
rete4,
rets4,
seer4,
sere4,
tees4,
tree4,
tres4,
3 letter words:
eff9,
efs6,
eft6,
fee6,
fer6,
fes6,
fet6,
ref6,
bee5,
bes5,
bet5,
reb5,
ere3,
ers3,
ree3,
res3,
ret3,
see3,
ser3,
set3,
tee3,
2 letter words:
ef5,
fe5,
be4,
er2,
es2,
et2,
re2,