6 letter words:
broker12,
5 letter words:
broke11,
borer7,
4 letter words:
berk10,
bork10,
kerb10,
kore8,
bore6,
robe6,
3 letter words:
kob9,
kor7,
oke7,
bro5,
brr5,
obe5,
orb5,
reb5,
rob5,
err3,
ore3,
roe3,
2 letter words:
be4,
bo4,
er2,
oe2,
or2,
re2,