4 letter words:
womb11,
brow9,
worm9,
brim8,
umbo8,
biro6,
brio6,
3 letter words:
bow8,
mow8,
bum7,
mib7,
mob7,
row6,
bio5,
bro5,
bur5,
mir5,
mor5,
obi5,
orb5,
rib5,
rim5,
rob5,
rom5,
rub5,
rum5,
urb5,
our3,
2 letter words:
ow5,
wo5,
bi4,
bo4,
mi4,
mo4,
mu4,
om4,
um4,
oi2,
or2,