7 letter words:
burrito9,
5 letter words:
bitou7,
bruit7,
burro7,
orbit7,
oubit7,
turbo7,
trior5,
4 letter words:
biro6,
birr6,
bito6,
bort6,
bout6,
brio6,
brit6,
brut6,
burr6,
obit6,
riot4,
rort4,
roti4,
rout4,
tiro4,
tirr4,
tori4,
torr4,
tour4,
trio4,
3 letter words:
bio5,
bit5,
boi5,
bor5,
bot5,
bro5,
brr5,
bru5,
bur5,
but5,
obi5,
orb5,
rib5,
rob5,
rub5,
tub5,
urb5,
ort3,
our3,
out3,
rit3,
rot3,
rut3,
tor3,
tui3,
2 letter words:
bi4,
bo4,
ob4,
io2,
it2,
oi2,
or2,
ou2,
ti2,
to2,
ur2,
ut2,