5 letter words:
bucko13,
4 letter words:
zouk17,
bozo15,
zobo15,
zobu15,
ouzo13,
bock12,
buck12,
boko10,
book10,
bouk10,
cook10,
kobo10,
3 letter words:
coz14,
cuz14,
zoo12,
bok9,
kob9,
cob7,
cub7,
ouk7,
boo5,
coo5,
obo5,
2 letter words:
zo11,
ko6,
bo4,
ob4,
oo2,
ou2,