7 letter words:
brockit15,
5 letter words:
brick13,
brock13,
trick11,
trock11,
boric9,
orbit7,
toric7,
4 letter words:
bock12,
birk10,
bork10,
brik10,
cork10,
rick10,
rock10,
tick10,
tock10,
crib8,
biro6,
bito6,
bort6,
brio6,
brit6,
cito6,
coir6,
coit6,
crit6,
obit6,
otic6,
torc6,
riot4,
roti4,
tiro4,
tori4,
trio4,
3 letter words:
bok9,
ick9,
kob9,
cob7,
irk7,
kir7,
kit7,
koi7,
kor7,
oik7,
rok7,
bio5,
bit5,
boi5,
bor5,
bot5,
bro5,
cit5,
cor5,
cot5,
obi5,
orb5,
orc5,
rib5,
rob5,
roc5,
tic5,
toc5,
ort3,
rit3,
rot3,
tor3,
2 letter words:
ki6,
ko6,
bi4,
bo4,
ob4,
io2,
it2,
oi2,
or2,
ti2,
to2,