8 letter words:
formwork20,
6 letter words:
biform13,
borrow11,
morrow11,
5 letter words:
brook11,
bromo9,
broom9,
iroko9,
morro7,
oribi7,
4 letter words:
fork11,
kiwi11,
womb11,
work11,
birk10,
book10,
bork10,
frow10,
kobo10,
mirk10,
woof10,
brow9,
firm9,
forb9,
form9,
from9,
worm9,
boom8,
brim8,
rook8,
roof7,
biro6,
birr6,
boor6,
brio6,
broo6,
miri6,
moor6,
room6,
3 letter words:
kif10,
wok10,
kob9,
bow8,
fib8,
fob8,
mow8,
irk7,
kir7,
koi7,
kor7,
mib7,
mob7,
fir6,
for6,
fro6,
rif6,
row6,
woo6,
bio5,
boo5,
bro5,
brr5,
mir5,
moo5,
mor5,
obi5,
orb5,
rib5,
rim5,
rob5,
rom5,
2 letter words:
ki6,
if5,
of5,
ow5,
wo5,
bi4,
bo4,
mi4,
mo4,
om4,
oi2,
or2,