5 letter words:
faint8,
unfit8,
4 letter words:
fain7,
faun7,
fiat7,
naif7,
tufa7,
anti4,
aunt4,
tain4,
tuna4,
unai4,
unit4,
3 letter words:
aft6,
fan6,
fat6,
fin6,
fit6,
fun6,
ain3,
ait3,
ani3,
ant3,
nit3,
nut3,
tan3,
tau3,
tin3,
tui3,
tun3,
uta3,
2 letter words:
fa5,
if5,
ai2,
an2,
at2,
in2,
it2,
na2,
nu2,
ta2,
ti2,
un2,
ut2,