5 letter words:
feres8,
frees8,
reefs8,
peers7,
peres7,
perse7,
prees7,
prese7,
speer7,
spree7,
4 letter words:
effs10,
fees7,
fere7,
free7,
reef7,
refs7,
serf7,
peer6,
pees6,
pere6,
pree6,
reps6,
seep6,
rees4,
seer4,
sere4,
3 letter words:
eff9,
efs6,
fee6,
fer6,
fes6,
ref6,
pee5,
per5,
pes5,
rep5,
ere3,
ers3,
ree3,
res3,
see3,
ser3,
2 letter words:
ef5,
fe5,
pe4,
er2,
es2,
re2,