4 letter words:
gowk12,
boko10,
book10,
kobo10,
gook9,
biog7,
gobo7,
3 letter words:
kow10,
wok10,
bok9,
kob9,
bow8,
koi7,
oik7,
wig7,
wog7,
big6,
bog6,
gib6,
gob6,
woo6,
bio5,
boi5,
boo5,
obi5,
obo5,
gio4,
goo4,
2 letter words:
ki6,
ko6,
ow5,
wo5,
bi4,
bo4,
ob4,
gi3,
go3,
io2,
oi2,
oo2,