6 letter words:
tubule8,
5 letter words:
bluet7,
butle7,
4 letter words:
zebu15,
jube13,
lutz13,
jute11,
belt6,
blet6,
blue6,
bute6,
lube6,
tube6,
lute4,
tule4,
3 letter words:
lez12,
jet10,
jeu10,
jut10,
bel5,
bet5,
but5,
tub5,
let3,
leu3,
tel3,
ulu3,
ute3,
2 letter words:
be4,
el2,
et2,
ut2,