5 letter words:
brick13,
brock13,
boric9,
oribi7,
4 letter words:
zoic15,
zori13,
bock12,
birk10,
bork10,
cork10,
rick10,
rock10,
crib8,
biro6,
brio6,
coir6,
3 letter words:
biz14,
coz14,
ick9,
kob9,
cob7,
irk7,
kir7,
koi7,
kor7,
bio5,
bro5,
cor5,
obi5,
orb5,
orc5,
rib5,
rob5,
roc5,
2 letter words:
ki6,
bi4,
bo4,
oi2,
or2,