6 letter words:
borzoi17,
5 letter words:
zorro14,
buroo7,
burro7,
4 letter words:
bozo15,
zobo15,
zobu15,
orzo13,
ouzo13,
zori13,
biro6,
birr6,
boor6,
brio6,
broo6,
burr6,
3 letter words:
biz14,
riz12,
zoo12,
bio5,
boi5,
boo5,
bor5,
bro5,
brr5,
bru5,
bur5,
obi5,
obo5,
orb5,
rib5,
rob5,
rub5,
urb5,
oor3,
our3,
roo3,
2 letter words:
zo11,
bi4,
bo4,
ob4,
io2,
oi2,
oo2,
or2,
ou2,
ur2,