5 letter words:
buchu12,
rhumb12,
crumb11,
churr10,
4 letter words:
chub11,
chum11,
much11,
buhr9,
curb8,
burr6,
curr6,
murr6,
ruru4,
3 letter words:
hub8,
hum8,
bum7,
cub7,
cum7,
brr5,
bru5,
bur5,
cru5,
cur5,
rub5,
ruc5,
rum5,
umu5,
urb5,
2 letter words:
ch7,
hm7,
uh5,
mu4,
um4,
ur2,