9 letter words:
buttoning12,
7 letter words:
bunting10,
butting10,
nutting8,
touting8,
6 letter words:
boning9,
tubing9,
bunion8,
button8,
noting7,
outing7,
toning7,
toting7,
tuning7,
5 letter words:
bigot8,
bingo8,
boing8,
biont7,
ingot6,
tigon6,
ungot6,
niton5,
union5,
4 letter words:
biog7,
bong7,
bung7,
bint6,
bitt6,
bott6,
bout6,
bunn6,
bunt6,
butt6,
obit6,
gout5,
ting5,
tong5,
tung5,
into4,
noun4,
tint4,
toit4,
tout4,
unit4,
unto4,
3 letter words:
big6,
bog6,
bug6,
gib6,
gob6,
bin5,
bio5,
bit5,
bot5,
bun5,
but5,
nib5,
nob5,
nub5,
obi5,
tub5,
gin4,
git4,
gnu4,
got4,
gun4,
gut4,
nog4,
tog4,
tug4,
inn3,
ion3,
nit3,
not3,
nun3,
nut3,
out3,
tin3,
tit3,
ton3,
tot3,
tui3,
tun3,
tut3,
2 letter words:
bi4,
bo4,
go3,
in2,
it2,
no2,
nu2,
oi2,
on2,
ti2,
to2,
un2,
ut2,