9 letter words:
umbellule13,
7 letter words:
blellum11,
5 letter words:
blume9,
umbel9,
umble9,
belle7,
emule7,
lemel7,
4 letter words:
bell6,
blee6,
blue6,
bull6,
emeu6,
leme6,
lube6,
mell6,
mule6,
mull6,
lull4,
lulu4,
3 letter words:
bum7,
bee5,
bel5,
elm5,
eme5,
emu5,
lum5,
mee5,
mel5,
meu5,
umu5,
eel3,
ell3,
lee3,
leu3,
ule3,
ulu3,
2 letter words:
be4,
em4,
me4,
mu4,
um4,
ee2,
el2,