5 letter words:
fundi9,
4 letter words:
daff11,
diff11,
duff11,
naff10,
find8,
fund8,
fain7,
faun7,
naif7,
unai4,
3 letter words:
aff9,
iff9,
dif7,
fad7,
fid7,
fud7,
fan6,
fin6,
fun6,
aid4,
and4,
dan4,
din4,
dui4,
dun4,
ain3,
ani3,
2 letter words:
fa5,
if5,
ad3,
id3,
ai2,
an2,
in2,
na2,
nu2,
un2,