6 letter words:
begirt9,
5 letter words:
giber8,
biter7,
bruit7,
brute7,
buret7,
rebut7,
tribe7,
tuber7,
tiger6,
uteri5,
4 letter words:
berg7,
brig7,
burg7,
gibe7,
grub7,
bier6,
bite6,
brie6,
brit6,
brut6,
bute6,
rube6,
tube6,
girt5,
gite5,
grit5,
grue5,
trig5,
trug5,
urge5,
etui4,
rite4,
tier4,
tire4,
true4,
3 letter words:
beg6,
big6,
bug6,
gib6,
bet5,
bit5,
bur5,
but5,
reb5,
rib5,
rub5,
tub5,
urb5,
erg4,
get4,
gie4,
git4,
gut4,
reg4,
rig4,
rug4,
teg4,
tug4,
ire3,
rei3,
ret3,
rue3,
rut3,
tie3,
tui3,
ute3,
2 letter words:
be4,
bi4,
er2,
et2,
it2,
re2,
ti2,
ut2,