9 letter words:
forefront15,
7 letter words:
offeror13,
troffer13,
fronter10,
refront10,
6 letter words:
effort12,
foetor9,
footer9,
reroof9,
roofer9,
enroot6,
retorn6,
rooter6,
torero6,
5 letter words:
offer11,
fetor8,
forte8,
front8,
frore8,
often8,
ofter8,
noter5,
retro5,
rotor5,
tenor5,
toner5,
trone5,
4 letter words:
teff10,
toff10,
fern7,
font7,
foot7,
fore7,
fort7,
fret7,
froe7,
reft7,
roof7,
tref7,
note4,
onto4,
rent4,
root4,
rote4,
roto4,
tern4,
tone4,
toon4,
tore4,
torn4,
toro4,
torr4,
3 letter words:
eff9,
off9,
eft6,
fen6,
fer6,
fet6,
foe6,
fon6,
for6,
fro6,
oft6,
ref6,
eon3,
ern3,
err3,
net3,
noo3,
nor3,
not3,
one3,
ono3,
oot3,
ore3,
ort3,
ret3,
roe3,
rot3,
ten3,
toe3,
ton3,
too3,
tor3,
2 letter words:
ef5,
fe5,
of5,
en2,
er2,
et2,
ne2,
no2,
oe2,
on2,
or2,
re2,
to2,