5 letter words:
biggs9,
brigs8,
grigs7,
riggs7,
4 letter words:
bigg8,
bigs7,
brig7,
gibs7,
bris6,
gigs6,
grig6,
iggs6,
ribs6,
rigg6,
gris5,
rigs5,
3 letter words:
big6,
gib6,
bis5,
gig5,
igg5,
rib5,
sib5,
gis4,
rig4,
sir3,
sri3,
2 letter words:
bi4,
gi3,
is2,
si2,