4 letter words:
whio10,
whir10,
boho9,
booh9,
bowr9,
brow9,
hobo9,
hori7,
biro6,
boor6,
brio6,
broo6,
3 letter words:
how9,
who9,
boh8,
bow8,
hob8,
hoi6,
hoo6,
oho6,
ooh6,
rho6,
row6,
woo6,
bio5,
boi5,
boo5,
bor5,
bro5,
obi5,
obo5,
orb5,
rib5,
rob5,
oor3,
roo3,
2 letter words:
hi5,
ho5,
oh5,
ow5,
wo5,
bi4,
bo4,
ob4,
io2,
oi2,
oo2,
or2,