6 letter words:
rebuke12,
5 letter words:
biker11,
burke11,
krubi11,
4 letter words:
berk10,
bike10,
birk10,
kerb10,
kibe10,
keir8,
kier8,
reek8,
beer6,
bier6,
bree6,
brie6,
rube6,
3 letter words:
eek7,
eke7,
irk7,
kir7,
kue7,
uke7,
bee5,
bur5,
reb5,
rib5,
rub5,
urb5,
ere3,
ire3,
ree3,
rei3,
rue3,
2 letter words:
ki6,
be4,
bi4,
er2,
re2,