6 letter words:
bistro8,
orbits8,
5 letter words:
biros7,
borts7,
brios7,
brits7,
obits7,
orbit7,
riots5,
rotis5,
tiros5,
torsi5,
trios5,
trois5,
4 letter words:
bios6,
biro6,
bits6,
bort6,
bots6,
brio6,
bris6,
brit6,
bros6,
obis6,
obit6,
orbs6,
ribs6,
robs6,
sorb6,
stob6,
orts4,
riot4,
roti4,
rots4,
sori4,
sort4,
stir4,
tiro4,
tori4,
tors4,
trio4,
3 letter words:
bio5,
bis5,
bit5,
bos5,
bot5,
bro5,
obi5,
orb5,
rib5,
rob5,
sib5,
sob5,
its3,
ors3,
ort3,
rot3,
sir3,
sit3,
sot3,
sri3,
tis3,
tor3,
2 letter words:
bi4,
bo4,
is2,
it2,
oi2,
or2,
os2,
si2,
so2,
ti2,
to2,