4 letter words:
zouk17,
bozo15,
zobo15,
zobu15,
ouzo13,
boko10,
book10,
bouk10,
buik10,
kobo10,
3 letter words:
wiz15,
biz14,
zoo12,
kow10,
wok10,
bok9,
kob9,
bow8,
koi7,
oik7,
ouk7,
woo6,
bio5,
boi5,
boo5,
obi5,
obo5,
2 letter words:
zo11,
ki6,
ko6,
ow5,
wo5,
bi4,
bo4,
ob4,
io2,
oi2,
oo2,
ou2,