5 letter words:
berko11,
broke11,
4 letter words:
zerk17,
zero13,
berk10,
boke10,
bork10,
kerb10,
kero8,
kore8,
roke8,
bore6,
robe6,
3 letter words:
zek16,
bez14,
rez12,
bok9,
keb9,
kob9,
erk7,
kor7,
oke7,
rok7,
bor5,
bro5,
obe5,
orb5,
reb5,
rob5,
ore3,
reo3,
roe3,
2 letter words:
zo11,
ko6,
be4,
bo4,
ob4,
er2,
oe2,
or2,
re2,