6 letter words:
fureur9,
4 letter words:
brew9,
furr7,
brer6,
burr6,
rube6,
ruer4,
ruru4,
3 letter words:
few9,
fub8,
web8,
erf6,
fer6,
feu6,
fur6,
ref6,
rew6,
brr5,
bru5,
bur5,
reb5,
rub5,
urb5,
err3,
rue3,
ure3,
2 letter words:
ef5,
fe5,
we5,
be4,
er2,
re2,
ur2,