5 letter words:
wacko14,
acock13,
cocoa9,
4 letter words:
cawk13,
cowk13,
wack13,
wock13,
cock12,
cook10,
coca8,
coco8,
3 letter words:
kaw10,
kow10,
wok10,
caw8,
cow8,
koa7,
oak7,
oka7,
woo6,
coo5,
oca5,
2 letter words:
ka6,
ko6,
aw5,
ow5,
wo5,
oo2,