6 letter words:
boffin14,
infeft12,
5 letter words:
biffo13,
befit10,
feint8,
fient8,
often8,
bento7,
beton7,
biont7,
boite7,
bonie7,
4 letter words:
biff12,
boff12,
fief10,
fife10,
niff10,
teff10,
tiff10,
toff10,
feni7,
fent7,
fine7,
fino7,
foen7,
foin7,
fone7,
font7,
info7,
neif7,
nief7,
nife7,
bein6,
beni6,
bent6,
bien6,
bine6,
bint6,
bite6,
bito6,
boet6,
bone6,
ebon6,
obit6,
into4,
nite4,
note4,
oint4,
onie4,
tine4,
tone4,
3 letter words:
eff9,
iff9,
off9,
fib8,
fob8,
eft6,
fen6,
fet6,
fie6,
fin6,
fit6,
foe6,
fon6,
nef6,
oft6,
tef6,
ben5,
bet5,
bin5,
bio5,
bit5,
boi5,
bon5,
bot5,
neb5,
nib5,
nob5,
obe5,
obi5,
eon3,
ion3,
net3,
nie3,
nit3,
not3,
one3,
ten3,
tie3,
tin3,
toe3,
ton3,
2 letter words:
ef5,
fe5,
if5,
of5,
be4,
bi4,
bo4,
ob4,
en2,
et2,
in2,
io2,
it2,
ne2,
no2,
oe2,
oi2,
on2,
te2,
ti2,
to2,