6 letter words:
ferule9,
fueler9,
refuel9,
unfree9,
unreel6,
5 letter words:
fleer8,
refel8,
enure5,
4 letter words:
enuf7,
feel7,
fere7,
fern7,
flee7,
flue7,
free7,
fuel7,
furl7,
heel7,
here7,
herl7,
hern7,
hurl7,
lehr7,
reef7,
erne4,
leer4,
lune4,
lure4,
nurl4,
reel4,
rule4,
rune4,
3 letter words:
feh9,
elf6,
fee6,
fen6,
fer6,
feu6,
flu6,
fun6,
fur6,
hen6,
her6,
hue6,
hun6,
ref6,
eel3,
ere3,
ern3,
lee3,
leu3,
nee3,
ree3,
rue3,
run3,
urn3,
2 letter words:
ef5,
eh5,
fe5,
he5,
uh5,
el2,
en2,
er2,
ne2,
nu2,
re2,
un2,