5 letter words:
bluff13,
buffo13,
4 letter words:
boff12,
buff12,
luff10,
nuff10,
bufo9,
flub9,
foul7,
boun6,
loun4,
noul4,
3 letter words:
off9,
fob8,
fub8,
flu6,
fon6,
fou6,
fun6,
ufo6,
bon5,
bun5,
lob5,
nob5,
nub5,
lou3,
2 letter words:
of5,
bo4,
ob4,
lo2,
no2,
nu2,
on2,
ou2,
un2,