7 letter words:
bookoos13,
6 letter words:
bookoo12,
5 letter words:
zooks18,
bozos16,
zobos16,
bokos11,
books11,
kobos11,
4 letter words:
swiz16,
bozo15,
zobo15,
zoos13,
kows11,
woks11,
bisk10,
boko10,
boks10,
book10,
bosk10,
kobo10,
kobs10,
bows9,
swob9,
kois8,
oiks8,
skio8,
sook8,
woos7,
bios6,
bois6,
boos6,
obis6,
obos6,
3 letter words:
wiz15,
biz14,
zoo12,
zos12,
kow10,
wok10,
bok9,
kob9,
bow8,
kis7,
koi7,
kos7,
oik7,
sik7,
ski7,
sow6,
wis6,
woo6,
wos6,
bio5,
bis5,
boi5,
boo5,
bos5,
obi5,
obo5,
obs5,
sib5,
sob5,
ios3,
iso3,
oos3,
2 letter words:
zo11,
ki6,
ko6,
ow5,
wo5,
bi4,
bo4,
ob4,
io2,
is2,
oi2,
oo2,
os2,
si2,
so2,