6 letter words:
muffle14,
fumble13,
5 letter words:
bluff13,
flume10,
blume9,
umbel9,
4 letter words:
buff12,
muff12,
bumf11,
luff10,
flub9,
fume9,
flue7,
fuel7,
blue6,
lube6,
mule6,
3 letter words:
eff9,
fem8,
fub8,
bum7,
elf6,
feu6,
flu6,
bel5,
elm5,
emu5,
lum5,
mel5,
leu3,
2 letter words:
ef5,
fe5,
be4,
em4,
me4,
mu4,
um4,
el2,