7 letter words:
doffing15,
6 letter words:
goniff13,
offing13,
5 letter words:
gonif9,
dingo7,
doing7,
4 letter words:
diff11,
doff11,
fido8,
find8,
fond8,
fino7,
foin7,
info7,
ding6,
dong6,
dino5,
nodi5,
3 letter words:
iff9,
off9,
dif7,
fid7,
fig7,
fog7,
fin6,
fon6,
dig5,
dog5,
gid5,
god5,
din4,
don4,
gin4,
nod4,
nog4,
ion3,
2 letter words:
if5,
of5,
do3,
go3,
id3,
od3,
in2,
no2,
oi2,
on2,