7 letter words:
further13,
6 letter words:
fuhrer12,
furder10,
furred10,
turfed10,
hurter9,
returf9,
5 letter words:
furth11,
derth9,
ruder6,
trued6,
truer5,
4 letter words:
heft10,
deft8,
feud8,
herd8,
hued8,
thud8,
fret7,
furr7,
huer7,
hurt7,
reft7,
ruth7,
tehr7,
terf7,
thru7,
tref7,
turf7,
duet5,
dure5,
durr5,
rude5,
rued5,
turd5,
urde5,
ruer4,
true4,
3 letter words:
feh9,
def7,
duh7,
edh7,
fed7,
fud7,
eft6,
erf6,
eth6,
fer6,
fet6,
feu6,
fur6,
her6,
het6,
hue6,
hut6,
ref6,
reh6,
tef6,
the6,
due4,
red4,
rud4,
ted4,
urd4,
err3,
ret3,
rue3,
rut3,
ure3,
ute3,
2 letter words:
ef5,
eh5,
fe5,
he5,
uh5,
de3,
ed3,
er2,
et2,
re2,
te2,
ur2,
ut2,