8 letter words:
coiffing17,
7 letter words:
coffing16,
coifing13,
6 letter words:
coffin14,
fifing13,
goniff13,
offing13,
congii9,
5 letter words:
ficin10,
gonif9,
coign8,
icing8,
incog8,
ionic7,
4 letter words:
coff12,
goff11,
fifi10,
niff10,
coif9,
conf9,
fico9,
foci9,
figo8,
fini7,
fino7,
foin7,
info7,
cion6,
coin6,
coni6,
icon6,
ingo5,
3 letter words:
iff9,
off9,
fig7,
fog7,
gif7,
cig6,
cog6,
fin6,
fon6,
con5,
gin4,
gio4,
gon4,
nog4,
ion3,
2 letter words:
if5,
of5,
gi3,
go3,
in2,
io2,
no2,
oi2,
on2,