9 letter words:
diffusing17,
6 letter words:
fifing13,
fusing10,
dingus8,
siding8,
5 letter words:
diffs12,
duffs12,
guffs12,
sniff11,
snuff11,
finds9,
fundi9,
funds9,
fungi9,
finis8,
dings7,
dungs7,
guids7,
nidus6,
suing6,
using6,
4 letter words:
diff11,
duff11,
guff11,
difs8,
fids8,
figs8,
find8,
fuds8,
fugs8,
fund8,
fins7,
funs7,
digs6,
ding6,
dugs6,
dung6,
gids6,
guid6,
dins5,
duns5,
gins5,
gnus5,
guns5,
nidi5,
sign5,
sing5,
snug5,
sung5,
nisi4,
3 letter words:
iff9,
dif7,
fid7,
fig7,
fud7,
fug7,
fin6,
fun6,
ifs6,
dig5,
dug5,
gid5,
din4,
dis4,
dui4,
dun4,
gin4,
gnu4,
gun4,
ids4,
ins3,
nus3,
sin3,
sun3,
uns3,
2 letter words:
if5,
id3,
in2,
is2,
nu2,
si2,
un2,
us2,