5 letter words:
about7,
beaut7,
biota7,
boite7,
buteo7,
tubae7,
4 letter words:
abet6,
abut6,
bait6,
bate6,
beat6,
beau6,
beta6,
bite6,
boat6,
bota6,
bout6,
bute6,
obia6,
obit6,
tabu6,
tuba6,
tube6,
auto4,
etui4,
iota4,
toea4,
3 letter words:
abo5,
bat5,
bet5,
bio5,
bit5,
boa5,
bot5,
but5,
oba5,
obe5,
obi5,
tab5,
tub5,
ait3,
ate3,
eat3,
eau3,
eta3,
oat3,
out3,
tae3,
tao3,
tau3,
tea3,
tie3,
toe3,
tui3,
uta3,
ute3,
2 letter words:
ab4,
ba4,
be4,
bi4,
bo4,
ae2,
ai2,
at2,
et2,
it2,
oe2,
oi2,
ta2,
ti2,
to2,
ut2,