7 letter words:
ferrule10,
6 letter words:
ferrum11,
feeler9,
ferrel9,
ferule9,
fueler9,
furler9,
reefer9,
refeel9,
refuel9,
relume8,
reeler6,
5 letter words:
femur10,
flume10,
fumer10,
fleer8,
freer8,
frere8,
refel8,
refer8,
emeer7,
lemur7,
melee7,
merer7,
merle7,
murre7,
lurer5,
ruler5,
4 letter words:
feme9,
fume9,
feel7,
fere7,
flee7,
flue7,
free7,
fuel7,
furl7,
reef7,
emeu6,
mere6,
merl6,
mule6,
mure6,
murr6,
leer4,
lure4,
reel4,
ruer4,
rule4,
3 letter words:
fem8,
elf6,
fee6,
fer6,
feu6,
flu6,
fur6,
ref6,
elm5,
eme5,
emu5,
lum5,
mel5,
rem5,
rum5,
eel3,
ere3,
err3,
lee3,
leu3,
ree3,
rue3,
2 letter words:
ef5,
fe5,
em4,
me4,
mu4,
um4,
el2,
er2,
re2,