6 letter words:
brunet8,
bunter8,
burnet8,
5 letter words:
brent7,
brunt7,
brute7,
buret7,
burnt7,
rebut7,
tuber7,
tuner5,
4 letter words:
enuf7,
fern7,
fret7,
reft7,
tref7,
turf7,
bent6,
bren6,
brut6,
bunt6,
burn6,
bute6,
rube6,
tube6,
unbe6,
rent4,
rune4,
runt4,
tern4,
true4,
tune4,
turn4,
3 letter words:
fub8,
eft6,
fen6,
fer6,
fet6,
feu6,
fun6,
fur6,
ref6,
ben5,
bet5,
bun5,
bur5,
but5,
neb5,
nub5,
reb5,
rub5,
tub5,
urb5,
ern3,
net3,
nut3,
ret3,
rue3,
run3,
rut3,
ten3,
tun3,
urn3,
ute3,
2 letter words:
ef5,
fe5,
be4,
en2,
er2,
et2,
ne2,
nu2,
re2,
un2,
ut2,