5 letter words:
bigos8,
biogs8,
brigs8,
biros7,
brios7,
giros6,
4 letter words:
bigs7,
biog7,
bogs7,
brig7,
gibs7,
gobs7,
bios6,
biro6,
brio6,
bris6,
bros6,
obis6,
orbs6,
ribs6,
robs6,
sorb6,
giro5,
rigs5,
sori4,
3 letter words:
big6,
bog6,
gib6,
gob6,
bio5,
bis5,
bos5,
bro5,
obi5,
orb5,
rib5,
rob5,
sib5,
sob5,
gor4,
gos4,
rig4,
ors3,
sir3,
sri3,
2 letter words:
bi4,
bo4,
go3,
is2,
oi2,
or2,
os2,
si2,
so2,