5 letter words:
boors7,
broos7,
4 letter words:
cobs8,
boor6,
boos6,
broo6,
bros6,
coos6,
cors6,
orbs6,
orcs6,
robs6,
rocs6,
sorb6,
3 letter words:
cob7,
boo5,
bos5,
bro5,
coo5,
cor5,
cos5,
orb5,
orc5,
rob5,
roc5,
sob5,
ors3,
2 letter words:
bo4,
or2,
os2,
so2,