6 letter words:
rubati8,
5 letter words:
bruit7,
rubai7,
tubar7,
urbia7,
4 letter words:
abri6,
abut6,
bait6,
baur6,
brat6,
brit6,
brut6,
buat6,
bura6,
rabi6,
riba6,
tabi6,
tabu6,
tuba6,
airt4,
aitu4,
arti4,
rait4,
ratu4,
tiar4,
3 letter words:
arb5,
bar5,
bat5,
bit5,
bra5,
bru5,
bur5,
but5,
rib5,
rub5,
tab5,
tub5,
urb5,
air3,
ait3,
art3,
ita3,
rai3,
rat3,
ria3,
rit3,
rut3,
tai3,
tar3,
tau3,
tui3,
uta3,
2 letter words:
ab4,
ba4,
bi4,
ai2,
ar2,
at2,
it2,
ta2,
ti2,
ur2,
ut2,