7 letter words:
rhubarb14,
5 letter words:
hurra8,
4 letter words:
buhr9,
habu9,
babu8,
barb8,
buba8,
burb8,
baur6,
bura6,
burr6,
3 letter words:
bah8,
hub8,
abb7,
bub7,
rah6,
arb5,
bar5,
bra5,
brr5,
bru5,
bur5,
rub5,
urb5,
2 letter words:
ah5,
ha5,
uh5,
ab4,
ba4,
ar2,
ur2,