6 letter words:
rubigo9,
outrig7,
5 letter words:
bigot8,
bourg8,
bruit7,
orbit7,
turbo7,
griot6,
grout6,
guiro6,
trigo6,
4 letter words:
biog7,
brig7,
burg7,
grub7,
biro6,
bort6,
bout6,
brio6,
brit6,
brut6,
obit6,
giro5,
girt5,
gout5,
grit5,
grot5,
trig5,
trog5,
trug5,
riot4,
roti4,
rout4,
tiro4,
tori4,
tour4,
trio4,
3 letter words:
big6,
bog6,
bug6,
gib6,
gob6,
bio5,
bit5,
bot5,
bro5,
bur5,
but5,
obi5,
orb5,
rib5,
rob5,
rub5,
tub5,
urb5,
git4,
gor4,
got4,
gut4,
rig4,
rug4,
tog4,
tug4,
ort3,
our3,
out3,
rot3,
rut3,
tor3,
tui3,
2 letter words:
bi4,
bo4,
go3,
it2,
oi2,
or2,
ti2,
to2,
ut2,