5 letter words:
bluff13,
4 letter words:
buff12,
luff10,
flub9,
enuf7,
flue7,
fuel7,
blue6,
lube6,
unbe6,
lune4,
3 letter words:
eff9,
fub8,
elf6,
fen6,
feu6,
flu6,
fun6,
bel5,
ben5,
bun5,
neb5,
nub5,
leu3,
2 letter words:
ef5,
fe5,
be4,
el2,
en2,
ne2,
nu2,
un2,