6 letter words:
bookoo12,
boohoo11,
5 letter words:
rhomb12,
brook11,
bromo9,
broom9,
4 letter words:
hook11,
book10,
bork10,
kobo10,
boho9,
hobo9,
homo9,
boom8,
rook8,
boor6,
broo6,
moor6,
room6,
3 letter words:
kob9,
hob8,
mho8,
ohm8,
kor7,
mob7,
oho6,
ooh6,
rho6,
boo5,
bro5,
moo5,
mor5,
orb5,
rob5,
rom5,
2 letter words:
hm7,
ho5,
oh5,
bo4,
mo4,
om4,
or2,