5 letter words:
cahow13,
chaco12,
coach12,
4 letter words:
chaw12,
chow12,
choc11,
coch11,
whoa10,
chao9,
coca8,
3 letter words:
haw9,
how9,
wha9,
who9,
ach8,
caw8,
cha8,
cow8,
hoc8,
och8,
hao6,
hoa6,
oca5,
2 letter words:
ch7,
ah5,
aw5,
ha5,
ho5,
oh5,
ow5,
wo5,