6 letter words:
rebore8,
5 letter words:
grebe8,
borer7,
roger6,
error5,
4 letter words:
berg7,
beer6,
bore6,
bree6,
brrr6,
robe6,
eger5,
ergo5,
goer5,
gore5,
gree5,
ogee5,
ogre5,
3 letter words:
beg6,
bog6,
gob6,
bee5,
bro5,
brr5,
obe5,
orb5,
reb5,
rob5,
ego4,
erg4,
gee4,
gor4,
reg4,
ere3,
err3,
ore3,
ree3,
roe3,
2 letter words:
be4,
bo4,
go3,
er2,
oe2,
or2,
re2,