7 letter words:
nubbing12,
6 letter words:
nubbin10,
4 letter words:
bing7,
bung7,
bunn6,
ginn5,
3 letter words:
bib7,
bub7,
big6,
bug6,
gib6,
gub6,
bin5,
bun5,
nib5,
nub5,
gin4,
gnu4,
gun4,
inn3,
nun3,
uni3,
2 letter words:
bi4,
gi3,
gu3,
ug3,
in2,
nu2,
un2,
