7 letter words:
freemen12,
6 letter words:
frenum11,
feeler9,
ferule9,
fueler9,
refeel9,
refuel9,
unfree9,
relume8,
unreel6,
5 letter words:
femur10,
flume10,
fumer10,
fleer8,
refel8,
emeer7,
lemur7,
lumen7,
melee7,
merle7,
neume7,
rumen7,
enure5,
4 letter words:
feme9,
fume9,
enuf7,
feel7,
fere7,
fern7,
flee7,
flue7,
free7,
fuel7,
furl7,
reef7,
emeu6,
menu6,
mere6,
merl6,
mule6,
mure6,
neem6,
neum6,
erne4,
leer4,
lune4,
lure4,
nurl4,
reel4,
rule4,
rune4,
3 letter words:
fem8,
elf6,
fee6,
fen6,
fer6,
feu6,
flu6,
fun6,
fur6,
ref6,
elm5,
eme5,
emu5,
lum5,
mel5,
men5,
mun5,
rem5,
rum5,
eel3,
ere3,
ern3,
lee3,
leu3,
nee3,
ree3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
em4,
me4,
mu4,
um4,
el2,
en2,
er2,
ne2,
nu2,
re2,
un2,