5 letter words:
greek10,
4 letter words:
geek9,
grok9,
kero8,
kore8,
reek8,
reke8,
roke8,
eger5,
ergo5,
gere5,
goer5,
gore5,
gree5,
ogee5,
ogre5,
rego5,
3 letter words:
keg8,
eek7,
eke7,
erk7,
kor7,
oke7,
rok7,
ego4,
erg4,
gee4,
geo4,
goe4,
gor4,
reg4,
ere3,
ore3,
ree3,
reo3,
roe3,
2 letter words:
ko6,
go3,
ee2,
er2,
oe2,
or2,
re2,