5 letter words:
faint8,
4 letter words:
baff12,
biff12,
naff10,
tiff10,
fain7,
fiat7,
naif7,
bait6,
bani6,
bint6,
anti4,
tain4,
3 letter words:
aff9,
iff9,
fab8,
fib8,
aft6,
fan6,
fat6,
fin6,
fit6,
ban5,
bat5,
bin5,
bit5,
nab5,
nib5,
tab5,
ain3,
ait3,
ani3,
ant3,
nit3,
tan3,
tin3,
2 letter words:
fa5,
if5,
ab4,
ba4,
bi4,
ai2,
an2,
at2,
in2,
it2,
na2,
ta2,
ti2,