6 letter words:
coffin14,
coiffe14,
office14,
4 letter words:
coff12,
fief10,
fife10,
niff10,
coif9,
conf9,
fice9,
fico9,
foci9,
feni7,
fine7,
fino7,
foen7,
foin7,
fone7,
info7,
neif7,
nief7,
nife7,
cine6,
cion6,
coin6,
cone6,
coni6,
icon6,
nice6,
once6,
onie4,
3 letter words:
eff9,
iff9,
off9,
fen6,
fie6,
fin6,
foe6,
fon6,
nef6,
con5,
eco5,
ice5,
eon3,
ion3,
nie3,
one3,
2 letter words:
ef5,
fe5,
if5,
of5,
en2,
in2,
io2,
ne2,
no2,
oe2,
oi2,
on2,