7 letter words:
fueller10,
6 letter words:
feller9,
felloe9,
ferule9,
fouler9,
fueler9,
fuller9,
refell9,
refuel9,
5 letter words:
fleer8,
flour8,
fluor8,
refel8,
4 letter words:
feel7,
fell7,
fere7,
flee7,
floe7,
flue7,
fore7,
foul7,
four7,
free7,
froe7,
fuel7,
full7,
furl7,
reef7,
rolf7,
euro4,
leer4,
lore4,
lour4,
lure4,
orle4,
reel4,
role4,
roll4,
roue4,
rule4,
3 letter words:
elf6,
fee6,
fer6,
feu6,
flu6,
foe6,
for6,
fou6,
fro6,
fur6,
ref6,
eel3,
ell3,
ere3,
lee3,
leu3,
ole3,
ore3,
our3,
ree3,
roe3,
rue3,
2 letter words:
ef5,
fe5,
of5,
el2,
er2,
lo2,
oe2,
or2,
re2,