6 letter words:
brucin10,
5 letter words:
bruin7,
burin7,
incur7,
runic7,
4 letter words:
crib8,
curb8,
brin6,
burn6,
curn6,
unci6,
uric6,
ruin4,
3 letter words:
cub7,
bin5,
bun5,
bur5,
cru5,
cur5,
nib5,
nub5,
rib5,
rub5,
urb5,
rin3,
run3,
urn3,
2 letter words:
bi4,
in2,
nu2,
un2,
