7 letter words:
fibroid13,
6 letter words:
forbid12,
5 letter words:
bifid11,
fiord9,
oribi7,
4 letter words:
forb9,
fido8,
ford8,
bidi7,
bird7,
drib7,
biro6,
brio6,
irid5,
3 letter words:
fib8,
fob8,
dif7,
fid7,
bid6,
bod6,
dib6,
fir6,
for6,
fro6,
rif6,
bio5,
bro5,
obi5,
orb5,
rib5,
rob5,
dor4,
rid4,
rod4,
2 letter words:
if5,
of5,
bi4,
bo4,
do3,
id3,
od3,
oi2,
or2,