6 letter words:
rebore8,
5 letter words:
boree7,
borer7,
breer7,
brere7,
4 letter words:
beer6,
bere6,
bore6,
bree6,
brer6,
robe6,
rore4,
3 letter words:
bee5,
bor5,
bro5,
brr5,
obe5,
orb5,
reb5,
rob5,
ere3,
err3,
ore3,
ree3,
reo3,
roe3,
2 letter words:
be4,
bo4,
ob4,
ee2,
er2,
oe2,
or2,
re2,