10 letter words:
preferrers15,
9 letter words:
preferrer14,
referrers12,
8 letter words:
referrer11,
7 letter words:
prefers12,
reefers10,
6 letter words:
prefer11,
freers9,
freres9,
reefer9,
refers9,
sperre8,
5 letter words:
feers8,
feese8,
ferer8,
feres8,
freer8,
frees8,
frere8,
reefs8,
refer8,
sefer8,
epees7,
peers7,
peres7,
perse7,
prees7,
prese7,
speer7,
spree7,
resee5,
serer5,
serre5,
4 letter words:
feer7,
fees7,
fere7,
free7,
reef7,
refs7,
serf7,
epee6,
peer6,
pees6,
pere6,
pree6,
reps6,
seep6,
eres4,
errs4,
rees4,
seer4,
sere4,
serr4,
3 letter words:
efs6,
erf6,
fee6,
fer6,
fes6,
ref6,
pee5,
per5,
pes5,
pre5,
rep5,
ere3,
err3,
ers3,
ree3,
res3,
see3,
ser3,
2 letter words:
ef5,
fe5,
pe4,
ee2,
er2,
es2,
re2,
