7 letter words:
fustian10,
6 letter words:
faints9,
fusain9,
unfits9,
5 letter words:
faint8,
fauns8,
fiats8,
naifs8,
snafu8,
tufas8,
unfit8,
antis5,
aunts5,
saint5,
satin5,
stain5,
suint5,
tains5,
tunas5,
unais5,
units5,
4 letter words:
fain7,
fans7,
fast7,
fats7,
faun7,
fiat7,
fins7,
fist7,
fits7,
funs7,
naif7,
sift7,
tufa7,
ains4,
aits4,
anis4,
anti4,
ants4,
anus4,
aunt4,
nits4,
nuts4,
sain4,
sati4,
snit4,
stun4,
suit4,
tain4,
tans4,
taus4,
tins4,
tuis4,
tuna4,
tuns4,
unai4,
unit4,
utas4,
3 letter words:
aft6,
fan6,
fas6,
fat6,
fin6,
fit6,
fun6,
ifs6,
ain3,
ais3,
ait3,
ani3,
ant3,
ins3,
its3,
nit3,
nus3,
nut3,
sat3,
sau3,
sin3,
sit3,
sun3,
tan3,
tas3,
tau3,
tin3,
tis3,
tui3,
tun3,
uns3,
uta3,
uts3,
2 letter words:
fa5,
if5,
ai2,
an2,
as2,
at2,
in2,
is2,
it2,
na2,
nu2,
si2,
ta2,
ti2,
un2,
us2,
ut2,