8 letter words:
cockatoo16,
5 letter words:
acock13,
coact9,
cocoa9,
4 letter words:
cock12,
cook10,
tack10,
tock10,
atok8,
coca8,
coco8,
koto8,
okta8,
toko8,
took8,
atoc6,
coat6,
coot6,
octa6,
taco6,
toco6,
3 letter words:
kat7,
koa7,
oak7,
oka7,
tak7,
act5,
cat5,
coo5,
cot5,
oca5,
toc5,
oat3,
oot3,
tao3,
too3,
2 letter words:
ka6,
ko6,
at2,
oo2,
ta2,
to2,