6 letter words:
brigue9,
burger9,
burier8,
rubier8,
5 letter words:
gebur8,
giber8,
brier7,
regur6,
rerig6,
urger6,
4 letter words:
berg7,
brig7,
burg7,
gibe7,
grub7,
bier6,
birr6,
brei6,
brer6,
brie6,
burr6,
rube6,
girr5,
grue5,
urge5,
iure4,
ruer4,
3 letter words:
beg6,
big6,
bug6,
gib6,
gub6,
brr5,
bru5,
bur5,
reb5,
rib5,
rub5,
urb5,
erg4,
gie4,
gue4,
gur4,
reg4,
rig4,
rug4,
err3,
ire3,
rei3,
rue3,
ure3,
2 letter words:
be4,
bi4,
gi3,
gu3,
ug3,
er2,
re2,
ur2,