5 letter words:
brook11,
borgo8,
4 letter words:
gowk12,
work11,
boko10,
book10,
bork10,
kobo10,
bowr9,
brow9,
gook9,
grok9,
grow8,
koro8,
rook8,
brog7,
gobo7,
boor6,
broo6,
goor5,
3 letter words:
kow10,
wok10,
bok9,
kob9,
bow8,
kor7,
rok7,
wog7,
bog6,
gob6,
row6,
woo6,
boo5,
bor5,
bro5,
obo5,
orb5,
rob5,
goo4,
gor4,
oor3,
roo3,
2 letter words:
ko6,
ow5,
wo5,
bo4,
ob4,
go3,
oo2,
or2,