5 letter words:
feint8,
fount8,
futon8,
often8,
unfit8,
unite5,
untie5,
4 letter words:
enuf7,
fine7,
fino7,
foin7,
font7,
info7,
neif7,
tofu7,
etui4,
into4,
nite4,
note4,
tine4,
tone4,
tune4,
unit4,
unto4,
3 letter words:
eft6,
fen6,
fet6,
feu6,
fie6,
fin6,
fit6,
foe6,
fon6,
fou6,
fun6,
oft6,
eon3,
ion3,
net3,
nit3,
not3,
nut3,
one3,
out3,
ten3,
tie3,
tin3,
toe3,
ton3,
tui3,
tun3,
ute3,
2 letter words:
ef5,
fe5,
if5,
of5,
en2,
et2,
in2,
it2,
ne2,
no2,
nu2,
oe2,
oi2,
on2,
ti2,
to2,
un2,
ut2,