6 letter words
BIGGER​10
5 letter words
GIBER​8
4 letter words (9 words)
BERG​7
BRIG​7
BRIE​6
BIER​6
RIGG​6
BIGG​8
GRIG​6
GIBE​7
BREI​6
3 letter words (15 words)
BIG​6
REG​4
EGG​5
GIG​5
GER​4
RIG​4
RIB​5
BEG​6
REI​3
IRE​3
IGG​5
REB​5
ERG​4
GIB​6
GIE​4
2 letter words (5 words)
BE​4
RE​2
ER​2
BI​4
GI​3