4 letter words:
cowy12,
yows10,
ywis10,
cosy9,
cows9,
coys9,
scow9,
3 letter words:
swy9,
yow9,
cow8,
coy8,
icy8,
oys6,
sow6,
soy6,
wis6,
wos6,
yos6,
cis5,
cos5,
sic5,
soc5,
ios3,
iso3,
2 letter words:
ow5,
oy5,
wo5,
yo5,
io2,
is2,
oi2,
os2,
si2,
so2,