6 letter words:
burier8,
rubier8,
5 letter words:
brief10,
fiber10,
fibre10,
firer8,
frier8,
rifer8,
wirer8,
wrier8,
brier7,
4 letter words:
wife10,
brew9,
fire7,
reif7,
rife7,
weir7,
wire7,
bier6,
birr6,
brie6,
burr6,
rube6,
ruer4,
3 letter words:
few9,
fib8,
fub8,
web8,
fer6,
feu6,
fie6,
fir6,
fur6,
ref6,
rif6,
brr5,
bur5,
reb5,
rib5,
rub5,
urb5,
err3,
ire3,
rei3,
rue3,
2 letter words:
ef5,
fe5,
if5,
we5,
be4,
bi4,
er2,
re2,