5 letter words:
cuber9,
rebec9,
4 letter words:
cube8,
curb8,
beer6,
bore6,
bree6,
cere6,
cero6,
core6,
cure6,
ecru6,
robe6,
rube6,
euro4,
roue4,
3 letter words:
cob7,
cub7,
bee5,
bro5,
bur5,
cee5,
cor5,
cru5,
cue5,
cur5,
ecu5,
obe5,
orb5,
orc5,
reb5,
rec5,
rob5,
roc5,
rub5,
urb5,
ere3,
ore3,
our3,
ree3,
roe3,
rue3,
2 letter words:
be4,
bo4,
er2,
oe2,
or2,
re2,