7 letter words:
burrier9,
6 letter words:
burier8,
burrer8,
orbier8,
ourebi8,
rubier8,
oorier6,
ourier6,
rorier6,
5 letter words:
borer7,
brier7,
buroo7,
burro7,
error5,
oorie5,
ourie5,
rorie5,
4 letter words:
bier6,
biro6,
birr6,
boor6,
bore6,
brei6,
brer6,
brie6,
brio6,
broo6,
brrr6,
burr6,
oboe6,
robe6,
rube6,
euoi4,
euro4,
iure4,
rore4,
roue4,
ruer4,
3 letter words:
bio5,
boi5,
boo5,
bor5,
bro5,
brr5,
bru5,
bur5,
obe5,
obi5,
obo5,
orb5,
reb5,
rib5,
rob5,
rub5,
urb5,
err3,
ire3,
oor3,
ore3,
our3,
rei3,
reo3,
roe3,
roo3,
rue3,
ure3,
2 letter words:
be4,
bi4,
bo4,
ob4,
er2,
io2,
oe2,
oi2,
oo2,
or2,
ou2,
re2,
ur2,