5 letter words:
gecko12,
cogie8,
4 letter words:
geck11,
cake10,
coke10,
kago9,
kaie8,
cage7,
ciao6,
agio5,
3 letter words:
ick9,
keg8,
ake7,
eik7,
kae7,
kai7,
kea7,
koa7,
koi7,
oak7,
oik7,
oka7,
oke7,
cag6,
cig6,
cog6,
ace5,
eco5,
ice5,
oca5,
age4,
ago4,
ego4,
gae4,
geo4,
gie4,
gio4,
goa4,
goe4,
2 letter words:
ka6,
ki6,
ko6,
ag3,
gi3,
go3,
ae2,
ai2,
ea2,
io2,
oe2,
oi2,