8 letter words:
freebees13,
7 letter words:
freebee12,
5 letter words:
beefs10,
feebs10,
feres8,
frees8,
reefs8,
beers7,
brees7,
resee5,
4 letter words:
beef9,
feeb9,
fees7,
fere7,
free7,
reef7,
refs7,
serf7,
beer6,
bees6,
bree6,
rebs6,
rees4,
seer4,
sere4,
3 letter words:
efs6,
fee6,
fer6,
fes6,
ref6,
bee5,
bes5,
reb5,
ere3,
ers3,
ree3,
res3,
see3,
ser3,
2 letter words:
ef5,
fe5,
be4,
er2,
es2,
re2,