6 letter words:
brucin10,
5 letter words:
cubit9,
bruin7,
bruit7,
brunt7,
burin7,
burnt7,
cutin7,
incur7,
runic7,
tunic7,
rutin5,
4 letter words:
crib8,
curb8,
bint6,
brin6,
brit6,
brut6,
bunt6,
burn6,
crit6,
cunt6,
curn6,
curt6,
unci6,
uric6,
ruin4,
runt4,
turn4,
unit4,
3 letter words:
cub7,
bin5,
bit5,
bun5,
bur5,
but5,
cru5,
cur5,
cut5,
nib5,
nub5,
rib5,
rub5,
tic5,
tub5,
urb5,
nit3,
nut3,
rin3,
run3,
rut3,
tin3,
tui3,
tun3,
urn3,
2 letter words:
bi4,
in2,
it2,
nu2,
ti2,
un2,
ut2,