5 letter words:
brung8,
4 letter words:
bund7,
bung7,
burd7,
burg7,
drub7,
grub7,
burn6,
drug6,
dung6,
durn5,
guru5,
nurd5,
rung5,
3 letter words:
bud6,
bug6,
dub6,
bun5,
bur5,
dug5,
nub5,
rub5,
urb5,
dun4,
gnu4,
gun4,
rug4,
urd4,
run3,
urn3,
2 letter words:
nu2,
un2,