7 letter words:
fuehrer13,
6 letter words:
fuhrer12,
5 letter words:
freer8,
frere8,
refer8,
4 letter words:
fere7,
free7,
here7,
reef7,
ruer4,
3 letter words:
feh9,
fee6,
fer6,
feu6,
fur6,
her6,
hue6,
ref6,
ere3,
err3,
ree3,
rue3,
2 letter words:
ef5,
eh5,
fe5,
he5,
uh5,
er2,
re2,