8 letter words:
unburrow13,
6 letter words:
burrow11,
5 letter words:
brown10,
bourn7,
burro7,
4 letter words:
bowr9,
brow9,
worn7,
born6,
boun6,
burn6,
burr6,
nurr4,
ourn4,
ruru4,
3 letter words:
bow8,
now6,
own6,
row6,
won6,
bon5,
bor5,
bro5,
brr5,
bru5,
bun5,
bur5,
nob5,
nub5,
orb5,
rob5,
rub5,
urb5,
nor3,
nur3,
our3,
run3,
urn3,
2 letter words:
ow5,
wo5,
bo4,
ob4,
no2,
nu2,
on2,
or2,
ou2,
un2,
ur2,