5 letter words:
block13,
brick13,
brock13,
boric9,
cibol9,
broil7,
4 letter words:
bock12,
bilk10,
birk10,
bork10,
cork10,
lick10,
lock10,
rick10,
rock10,
bloc8,
crib8,
kilo8,
viol7,
virl7,
birl6,
biro6,
boil6,
brio6,
coil6,
coir6,
loci6,
roil4,
3 letter words:
ick9,
kob9,
cob7,
ilk7,
irk7,
kir7,
koi7,
kor7,
bio5,
bro5,
col5,
cor5,
lib5,
lob5,
obi5,
orb5,
orc5,
rib5,
rob5,
roc5,
oil3,
2 letter words:
ki6,
bi4,
bo4,
li2,
lo2,
oi2,
or2,