5 letter words:
greek10,
beget8,
grebe8,
beret7,
egret6,
greet6,
4 letter words:
berk10,
kerb10,
geek9,
keet8,
reek8,
trek8,
berg7,
beer6,
beet6,
bree6,
eger5,
gree5,
rete4,
tree4,
3 letter words:
keg8,
eek7,
eke7,
beg6,
bee5,
bet5,
reb5,
erg4,
gee4,
get4,
reg4,
teg4,
ere3,
ree3,
ret3,
tee3,
2 letter words:
be4,
er2,
et2,
re2,