6 letter words:
arbour8,
5 letter words:
arbor7,
barer7,
barre7,
borer7,
burro7,
rebar7,
urare5,
4 letter words:
bare6,
bear6,
beau6,
boar6,
bora6,
bore6,
brae6,
bura6,
burr6,
robe6,
rube6,
aero4,
euro4,
orra4,
rare4,
rear4,
roar4,
roue4,
ruer4,
urea4,
3 letter words:
abo5,
arb5,
bar5,
boa5,
bra5,
bro5,
brr5,
bur5,
oba5,
obe5,
orb5,
reb5,
rob5,
rub5,
urb5,
are3,
ear3,
eau3,
era3,
err3,
oar3,
ora3,
ore3,
our3,
roe3,
rue3,
2 letter words:
ab4,
ba4,
be4,
bo4,
ae2,
ar2,
er2,
oe2,
or2,
re2,