9 letter words:
burrowing15,
7 letter words:
burring10,
6 letter words:
bowing12,
burrow11,
rowing10,
boring9,
orbing9,
robing9,
rubigo9,
rigour7,
5 letter words:
brown10,
grown9,
owing9,
wring9,
wrong9,
wrung9,
bingo8,
boing8,
bourg8,
bring8,
brung8,
bourn7,
bruin7,
burin7,
burro7,
robin7,
giron6,
groin6,
guiro6,
rigor6,
ruing6,
unrig6,
4 letter words:
brow9,
gown8,
grow8,
wing8,
biog7,
bong7,
brig7,
bung7,
burg7,
grub7,
wino7,
worn7,
biro6,
birr6,
born6,
brin6,
brio6,
burn6,
burr6,
girn5,
giro5,
grin5,
ring5,
rung5,
inro4,
iron4,
noir4,
nori4,
ruin4,
3 letter words:
bow8,
wig7,
wog7,
big6,
bog6,
bug6,
gib6,
gob6,
now6,
own6,
row6,
win6,
won6,
bin5,
bio5,
bro5,
brr5,
bun5,
bur5,
nib5,
nob5,
nub5,
obi5,
orb5,
rib5,
rob5,
rub5,
urb5,
gin4,
gnu4,
gor4,
gun4,
nog4,
rig4,
rug4,
ion3,
nor3,
our3,
rin3,
run3,
urn3,
2 letter words:
ow5,
wo5,
bi4,
bo4,
go3,
in2,
no2,
nu2,
oi2,
on2,
or2,
un2,